To obtain oxygen into the blood, its blood supply (cardiovascular system) pumps blood from of the heart to the lungs. Oxygen-depleted blood is returned to the heart through veins to restart circulation.
The respiratory system is supported by the circulatory system, that carries blood from and into the lungs. The circulatory system consists of the heart and blood arteries. The circulatory system assists in moving nutrients and oxygen through the lungs to the body's tissues and organs. Additionally, it aids in the removal of trash and carbon dioxide. The portion of the airway that extends below the larynx is known as the trachea (windpipe) (LAIR-inks). To keep the trachea (TRAY-kee-uh) open, its walls are lined with hard cartilage rings. Cilia that border the trachea move fluids and other objects out of the airway to prevent them from entering the lungs.
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what are in the synaptic knobs that then travel across the synaptic cleft to initiate a response in the next cell
Neurotransmitter molecules penetrate the synaptic cleft and attach to receptor proteins on postsynaptic cells.
Synapses can be thought of as converting an electrical signal (the action potential) into a chemical signal in the form of neurotransmitter release, and then switching the signal back into an electrical form when the transmitter binds to the postsynaptic receptor.
These stimulate the production of "neurotransmitters," which pass the impulse across the "synapse to the next neuron." After a nerve impulse releases "neurotransmitters," these "chemical messengers" travel over the tiny "synaptic gap" and are taken up by specialized receptors on the surface of the next cell.
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What are 4 characteristics of a mollusk?
Four important characteristics of a mollusk are:
Mollusk are found in marine and freshwater habitats.Mollusk have organ system level of organization. Body is divided into head, muscular foot and mantle.The head of mollusk have of tentacles and compound eyes.The phylum Mollusca has many distinctive features and special characteristics. which include a mantle that has mantle cavity, visceral mass, foot, and radula. Mollusks also includes various classes like Gastropod, Bivalvia, Cephalopoda, and Polyplacophora .
Gastropods have a special characteristics that includes spirally-coiled external shell while others mollusks usually have a flattened shell, and many of them doesn't possess any shell as outer structure.
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Which of the following statements is FALSE? gametophytes produce eggs and sperm sporophytes produce spores angiosperms are flowering plants in non-vascular plants, the gametophyte is the dominant form of the plant in vascular plants, the gametophyte is the dominant form of the plant
The statement "in vascular plants, the gametophyte is the dominant form of the plant" is false, because the gametophyte is the dominant form of the plant in non-vascular plants.
Thus, the correct answer is E.
Gаmetophyte, in plаnts аnd certаin аlgаe, the sexuаl phаse (or аn individuаl representing the phаse) in the аlternаtion of generаtions, а phenomenon in which two distinct phаses occur in the life history of the orgаnism, eаch phаse producing the other. The nonsexuаl phаse is the sporophyte.
Over the course of evolution, the gаmetophyte stаge hаs become progressively reduced. Thus, the gаmetophyte stаge is dominаnt in the more primitive (nonvаsculаr) plаnts (bryophytes), whereаs the sporophyte is the dominаnt phаse in the life cycle of higher (i.e., vаsculаr) plаnts. In аlgаe, the dominаnt phаse often depends on environmentаl conditions, though some species hаve determinаnt life cycles.
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Although genetic mutations may occur spontaneously in organisms, the incidence of such mutations may be increased by
Although genetic mutations may occur spontaneously in organisms, the incidence of such mutations may be increased by Mutagenic agents.
Mutagenic compounds, commonly referred to as mutagens, are what cause mutations. A mutagen is a substance that increases the frequency at which mutations happen. The process through which a mutagen causes mutations is known as mutagenesis.
The term "mutation" is frequently used to describe an inherited change in DNA structure that does not result via genetic recombination. An organism with one or more mutated genes is referred to as a mutant. A mutation may change a gene's mode of expression, changing the mutant's phenotype from the one it originally assumed. Mutations can be either spontaneous or induced. Using mutation interrogation techniques, only the presence or absence of known DNA sequence changes may be determined. In lab settings, they are used to analyse a particular group of CFTR mutations that make up a CF test panel.
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Where does the light reaction happens in plant?
The light reactions of plants are the photochemical reactions that take place in the thylakoid membrane of chloroplasts and convert light energy into chemical energy in the form of ATP and NADPH.
Light reactions in plants occur in the thylakoid membranes of organelles referred to as chloroplasts. The light processes are mostly controlled by photosystems, sizable complexes of proteins and pigments (light-absorbing molecules) that are designed to capture light. The light reactions processes include the plants division of water into oxygen, protons, and electrons, and take place in the chloroplast thylakoid membrane. The light reactions occur in the chloroplast thylakoid membrane and involve the splitting of water into oxygen, plants,protons and electrons.
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What are some factors that increase the chance of a genetic mutation happening in your cells?
Errors in replication, exposure to ultraviolet radiation and exposure to chemicals are some factors that increase the chance of a genetic mutation happening in your cells.
A mutation or a genetic mutation is basically a change in the DNA sequence of a gene which leads to the production of something different. It is able to create a permanent change to that particular gene's DNA sequence. Genetic variations are although important as they allow evolution in humans. They can also sometimes cause genetic disorders.
Replication is the process by which the DNA replicates itself. Sometimes errors happen in replication which can change the sequence of the DNA and cause mutations. Exposure to some environmental chemicals and also to ultraviolet radiation can cause mutation and alter the DNA sequence.
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In third-degree AV block, there is no electrical communication between the atria and ventricles, so there is no relationship between the P waves and the _________.
In third-degree, or complete, heart block there is a shortfall of AV nodal conduction, and the P waves are never connected with the QRS edifices. At the end of the day, the supraventricular driving forces produced don't lead to the ventricles.
Third-degree AV block demonstrates a total loss of correspondence between the atria and the ventricles. Without fitting conduction through the AV hub, the SA hub can't act to control the pulse, and heart result can reduce auxiliary to loss of coordination of the atria and the ventricles.
Electrical signs don't go from your atria to your ventricles with this kind. There is a finished disappointment in electrical conduction. This can bring about no heartbeat or a listless heartbeat on the off chance that a reinforcement pulse is available.
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Why must cells have an upper and lower limit to their size?
Cells are the basic building blocks of life and, as such, are essential for the functioning of all living organisms. For that reason, it is important for cells to have an upper and lower limit to their size. These limits serve vital roles in cell structure, function, and metabolism.
The upper limit to cell size is important because too large of a cell can cause problems with cellular communication and the distribution of nutrients throughout the cell. In general, larger cells are more difficult to maintain, as they require more energy and resources to sustain their structure. If a cell exceeds its upper limit, it becomes too big to be supported by the metabolic resources available to it and eventually dies.
The lower limit is also important for cellular function. Cells that are too small have difficulty forming necessary structures and have a harder time performing certain metabolic processes. This is because small cells are limited in the number of organelles they can contain and the number of molecules they can process. Small cells are also less efficient in their use of energy and resources, making it difficult for them to survive in certain environments.
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How many days Monggo seeds grow?
The Monggo seeds require 3-4 months of time to reach the stage of maturity from their initial seed stage.
Monggos is another name for the mung beans also known by the scientific name Vigna radiata. These are green colored lentils that belong to the legume family. The main regions where the cultivation of mung beans takes place is East, Southeast and South Asia.
Seed is the initial stage of any plant. It is the fertilized ovule that remains undeveloped as a plant. A seed has the potential to remain dormant for various years. It however possesses all the necessary enzymes and nutrients for its growth and development into a mature plant.
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What offspring would you predict from a black female cat and an orange male cat?
Black females and orange males also give birth to calico cats. Usually, male kittens only inherit the male's coat color. The Y chromosome determines the sex of males, but has nothing to do with coat color.
Calico cats are domestic cats of all breeds with tricolor coats. Calico cats are most commonly thought of as being 25% to 75% white with large orange and black spots, but they can also include other colors in their patterns. A variation of off-white and gray patches called muted calico sometimes occurs.
The dominant O allele encodes an orange tone, while the recessive O allele encodes non-orange pigmentation (black or brown).
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What happens to the amount of nutrients needed as a cell increases in volume?
As the volume of a cell increases, so does its need for nutrients. This is because larger cells require more energy, as well as more materials, to sustain their increased size. In order to keep up with the increased demand for energy, larger cells must absorb more nutrients, including proteins, carbohydrates, lipids, and other essential molecules.
The two primary methods by which cells acquire nutrients are diffusion and active transport. Diffusion is a passive process that occurs when molecules move from an area of higher concentration to an area of lower concentration. This process occurs in cells and can provide the necessary nutrients for growth and maintenance. However, diffusion becomes increasingly inefficient as the cell size increases due to the increased distance the molecules must travel.
Active transport, on the other hand, is an energy-driven process in which molecules are actively transported into the cell from an area of lower concentration to an area of higher concentration. This process allows for the rapid transport of larger molecules and the more efficient uptake of nutrients. As the volume of the cell increases, more active transport is needed to provide the necessary nutrients. This can be seen in the process of endocytosis, where the cell engulfs nutrients from the environment and transports them into the cell.
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To us, the positions of the continents never seem to change, but scien-
tists believe that they are always moving.
What explains why most humans have not seen a change in the continent's
positions?
Due to the slower velocity of continental drift, most humans have not seen a change in the continent's positions.
What is continental drift?Continental drift is the movement of continents towards and away from each other. These are large-scale, horizontal movements that span thousands of years.
The movement of the earth's crust, known as plate tectonics is the driving force behind continental movement. Earthquakes are byproducts of tectonics.
The average velocity with which the plates move ranges from 1-5 cm/year. Due to this reason, it takes thousands of years for visual confirmation of continental movement.
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Although it is against the law, people hunt and capture mountain gorillas in Africa. They sell the baby gorillas for large sums of money. This is an example of which factor that affects biodiversity
An example of how poaching affects biodiversity is selling baby gorillas at high prices.
Poaching is the illegal trade and killing of wild animals. Some of the animals and plants are sold as trophies and "folk medicines", others as pets and houseplants. The level of poaching cannot be overstated, as there are more tigers in captivity than in the wild. Killing wildlife is bad for biodiversity. Illegal hunting and trafficking of animals.
Poaching was once done by poor farmers to make a living and supplement their meager diet. He opposed the hunting privileges of nobles and monarchs.
Poaching, hunting, illegal shooting, trapping or taking of fish or plants from private property or any place where such practices are expressly reserved or prohibited by law. Poaching is a major existential threat to many wildlife species worldwide and a major cause of biodiversity loss.
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Complete question :
Although it is against the law, people hunt and capture mountain gorillas in Africa. They sell the baby gorillas for large sums of money. This is an example of which factor that affects biodiversity?
A. Pollution
B. Nonnative Species
C. Habitat Destruction
D. Poaching
On a hot summer day you can attend a baseball game or sit on your favorite beach and read a book without
immediate threat of heat exhaustion because the water in your cells resists rapid changes in temperature. This
is because it requires a great deal of energy to break
This is because it requires a great deal of energy to break large number of hydrogen bonds between water molecules.
The body reacts to an excessive loss of water and salt, typically through excessive sweating, by producing heat exhaustion. The elderly are especially susceptible to heat exhaustion. high blood pressure sufferers. those engaged in hot-weather work.
Not a covalent link to a hydrogen atom, hydrogen bonding is an unique kind of dipole-dipole interaction between molecules. It comes about as a result of the attraction between two extremely electronegative atoms, such as N, O, or F, and a hydrogen atom that is covalently bound to one of them.
A water molecule has a bent overall structure and is made up of two hydrogen atoms bound to an oxygen atom.
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Which of the following is the most likely reason that the greatest number of extinctions of bird species occurred in the period 1901-2000
Increased environmental disturbances from human activities and altered bird habitats are the main reason behind the extinction of bird species between 1901-2000.
Between 1901 and 2000, 90 more mammal species went extinct than between 1801 and 1900. Environmental issues caused by human activities have gotten worse Changes in bird habitats between 1901 and 2000 was the main factor in the demise of numerous bird species.
When something is eradicated, it ceases to exist. There could be a lot of reasons for it, such as the extinction of some species as a result of overhunting, a lack of food, or natural disasters.
The mass extinction, which has only occurred five times throughout history, comes first. There are essentially two types of extinction. The second factor is background extinctions, which occur over a longer period of time and have a considerable impact on the pace of natural extinction.
The complete question is:
Which of the following is the most likely reason that the greatest number of extinctions of bird species occurred in the period 1901-2000?
(a). Increased environmental disturbances from human activities altered bird habitats.
(b). Deforestation
(c). Creating wildlife refugees
(d). species richness
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Please help me with biology works
I need this ASAP
Answer:
H
Explanation:
I can’t even see the questions
A curriculum developed by an outside group for use by others is called a(n) _________.
a. peer reviewed program
b. canned program
c. independent program
d. culturally competent program
A curriculum developed by an outside group for use by others is called a canned program. So option b is correct.
A canned program is a pre-packaged curriculum that is designed and developed by an outside organization or group. It is then made available for use by other individuals or organizations without the need for significant modification or customization.
Canned programs are often used in education, where they are commonly used by schools or school districts to provide a standardized curriculum for students. They are also used in other fields, such as business and healthcare, where they provide a set of guidelines and procedures that are intended to be followed by employees or practitioners.
Canned programs are often developed by experts in a particular field, such as educators or subject matter experts, and are based on current research and best practices. They can be a valuable resource for organizations that do not have the resources or expertise to develop their own curriculum.
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Why do cloned calico cats look different?
Answer:
Even with the exact same genetic make-up, a calico cat’s coloration would be different than her twin’s because it’s random whether a cell codes for orange or black fur. The same goes for clones.
Explanation:
Regulating blood flow through the cardiovascular system, propelling food through the gut, and squeezing secretions from glands describes which type of muscle fibers
The type of muscle fiber responsible for the regulation of flow in cardiovascular system squeezing gland secreations are smooth muscle fiber.
What are muscle?
Muscles are the types of cell bundle present across an organ to protect it and helps in the movement. Musclescan be differentiates as smooth muscles, straighted muscles, non straighted muscles and others.
The movement of food across gut, cardiovascular blood flow and release from glands are involuntary actions anf are described by the movement of smooth muscles.
What makes a body of water a lake?
If a body of water satisfies the following requirements, it is typically referred to be a lake. There is a body of still water there that is encircled by land. It does not belong to or connect to an ocean or sea, nor is it a river or other body of water that does.
Its features are not reliant on those of another body of water since it has its own ecology. It is a sizable body of water, often larger than a pond, and ranges in size from little ponds to enormous lakes like Lake Superior and Lake Victoria.
Although it can be constructed by human activity such as damming a river or glacial activity, this reservoir was not made by humans.
It's worth noting that the definition of a lake can vary depending on the region, and some bodies of water that are called lakes in one area may not be considered lakes in another area. Additionally, some bodies of water that meet these criteria may not be referred to as lakes, but rather as bodies of water such as a loch in Scotland or a fjord in Norway.
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These pea plants have been in the sunlight since early morning.
What can the pea plants do because they are in sunlight? What does this mean for the number of energy storage molecules in the pea plants?
The pea plants can…
Responses
With the help of photosynthesis, the pea plants can take in carbon from the air. The carbon is used to make energy storage molecules.
What do you mean by photosynthesis?Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.
The energy from light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen gas.
The main purpose of photosynthesis is to convert radiant energy from the sun into chemical energy that can be used for food. Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar.
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Researchers radio-tagged gray whales to understand the timing of their migration and details of their journey. What types of data were researchers able to collect about the gray whale migrations
Types of data were researchers able to collect about the gray whale migrations:
Migration begins when Arctic ice begins to form over the foraging grounds.Gray whales migrate to California's Baja Lagoon in December and January.On the way south, the female travels before the male.The northward migration begins after the plankton bloom and the peak of summer in the highlands.Most grays migrate to forage in the Arctic during the summer. Meanwhile, the winter migration originates in the waters off Baja California, Mexico where they feed the newborn calves. The annual round trip is taken by more than 10,000 million.
The gray whale (Eschrichtius robustus) frequently migrates in large flocks along the west coast of North America. With a width of between 13 – 16 meters, these pauses often live in calm and warm waters as a haven from predators.
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The purpose of this experiment is to separate the pigments to identify each pigment by their color properties and how far they travel using paper chromatography.
The purpose of this experiment is to separate the pigments to identify each pigment by their color properties and how far they travel using paper chromatography is the goal of the experiment separation of pigments by paper chromatography.
Paper chromatography is a separation method in the form of color propagation that can be seen on the chromatography paper and the spots that are there to compare the spots from the sample and the spots from the standard.
Filter paper in paper chromatography is used as a stationary phase in the separation process. The selection of filter paper used is one of the determining factors for success in chemical separation and analysis. So in paper chromatography experiments the dyes will be distributed, so that the pigments can be easily separated and identified based on their color properties.
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the formation of a cell plate is beginning acorss the middle of a cell and nuclie are reforminat at oppostie ends of the cell. What kind of cell is this
A plant cell undergoing cytokinesis is one that has a cell plate across the middle of its cell and nuclei developing at opposing ends of the cell.
So, The right answer is A; cytokinesis is the process by which a cell's cytoplasm divides into two, giving rise to two daughter cells.
The process of cytokinesis happens in both plant and animal cells, although in distinct ways. Plant cells have a cell plate in the centre, whereas animal cells have a cleavage furrow.
As a result, a plant cell that forms a cell plate across the middle of its cell and nuclei at opposing ends of the cell is experiencing cytokinesis.
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Full Question ;
The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this?
a. a plant cell undergoing cytokinesis
b. an animal cell in metaphase
c. an animal cell in telophase
d. a plant cell in metaphase
e. an animal cell undergoing cytokinesis
Despite differences in onset, involvement, and symptomatology, all of the spondyloarthropathies involve:
A)
sacroiliitis.
B)
calcinosis.
C)
excessive bone turnover.
D)
autoimmune etiology.
Despite differences in onset, involvement, and symptomatology, all of the spondyloarthropathies involve Sacroiliitis.
Spondyloarthritis is a form of arthritis that affects the joints of the spine and, in some cases, the arms and legs as well. Additionally, the skin, intestines, and eyes may be affected. Most patients' primary symptom, or what they experience, is low back discomfort. Axial spondyloarthritis is where this happens the most frequently.
One or both of your sacroiliac joints may become inflamed, which is known as sacroiliitis. Where the sacrum (the triangular final segment of the spine) meets the ilium is where these two joints are situated (a part of the pelvis).
Lower back pain, as well as pain in the thighs or buttocks, are frequently brought on by sacroiliitis. Since many different illnesses can cause pain in the same places, diagnosing them can be challenging.
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While both the endocrine and nervous systems are involved with communication, they differ in their mechanisms. What is one difference between hormones of the endocrine system and neurotransmitters of the nervous system
Answer:
Hormones are released by the glands in the endocrine system and are transmitted into the bloodstream..while neurotransmitters are released by the presynaptic terminal in the synapse and are transmitted across the synaptic cleft....
I hope this helps
Why did the husband become terrified in the world on turtle's back?
In the beginning of "The World on Turtle's Back," we can see that a character named just as "husband" is terrified of being punished for having destroyed the sacred tree that lit up the world where he lived.
"The World on Turtle's Back," is a myth created by the Iroquois to explain the origin of the earth and living things. In this myth, we can see:
There was a realm above the heavens that was created even before the earth was created.
This realm was inhabited by magical beings who did not die, grow old, or get sick. They were called the people of heaven.
There was a tree in the center of that realm that was holy.
The tree lit up the entire kingdom, since the sun did not exist.
One day, one of the women of the heavenly realm discovered that she was pregnant with twins. She is very happy and tells her husband, but he is furious with the news, to the point of pulling the sacred tree from the ground. This causes a hole and he throws his pregnant wife into that hole.
The man is terrified, not because he threw his wife to an unknown end, but because he destroyed the sacred tree and is afraid of being punished.
Despite the fall, the woman survives and gives birth to the twins who will create all the elements of planet earth.
With this, we can conclude that the Iroquois also created myths to explain things they did not know, such as the origin of the planet and human beings.
Your question is incomplete most probably your full question was
In the beginning of "The World on Turtle's Back," why did the husband become "terrified"? He was terrified the he might never see his wife again. He was terrified that his wife might fall through the hole in the sky. He was terrified that he would be punished for marring a sacred tree. He was terrified that the Great Tree would fall into the ocean.
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what is the similar between an estuary zone and intertidal zone
An estuary zone and an intertidal zone are both areas along the coast where freshwater and seawater mix. Both are affected by the tidal movements of the ocean and support a wide variety of plants and animals adapted to living in these environments. Both estuaries and intertidal zones are important ecosystems that provide habitat for many species and support economic activities such as fishing and tourism. They are also vulnerable to pollution and other human impacts and are often protected and preserved
-how does hyperventilation decrease the respiratory rate
Hyperventilation decreases the respiratory rate by decreasing the levels of carbon dioxide in the blood, which leads to a decrease in the drive to breathe.
What is respiratory rate?The number of breaths you take each minute is referred to as your respiratory rate. Adults typically breathe 12 to 20 times per minute while at rest. When resting, an abnormal respiration rate is one that is less than 12 or greater than 25 breaths per minute.
Hyperventilation leads to a decrease in the drive to breathe. This is because the primary stimulus for breathing is the buildup of carbon dioxide in the body. When carbon dioxide levels drop, the body's natural drive to breathe also decreases, resulting in a slower respiratory rate.
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Which of the following is a true statement regarding photoreceptors? Check all that apply a. Rods are responsible for night vision. b. Rods are associated with photopic vision. c. Cones are associated with color vision. d. There are more cones than rods e. Cones function in brighter light.
the following is a true statement regarding photoreceptors is Rods are responsible for night vision.
What are the two types of photoreceptors?Two types of photoreceptors reside in the retina: cones and rods. The cones are responsible for daytime vision, while the rods respond under dark conditions. The cones come in three varieties: L, M, and S types.
What do rod photoreceptors detect?Photoreceptors in the retina are classified into two groups, named after their physical morphologies. Rod cells are highly sensitive to light and function in nightvision, whereas cone cells are capable of detecting a wide spectrum of light photons and are responsible for colour vision.
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The true statement about photoreceptors is-"Rods are responsible for night vision".
What are the four photoreceptors present in the eyes?There are four photoreceptor types in the human retina- Short-wavelength cones (blue), medium-wavelength cones (green), long-wavelength cones (red) and rods.
What is the main function of photoreceptors?Photoreceptors are specialized neurons found in the retina that convert light into electrical signals that stimulate physiological processes. Signals from the photoreceptors are sent through the optic nerve to the brain for processing.
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