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Question Video: Describing the Role of Receptors in the Human Body Biology

Which of the following best describes the role of receptors in the human body? [A] They transmit electrical impulses across synapses. [B] They transmit signals across the central nervous system. [C] They detect changes in the external environment. [D] They release hormones. [E] They bring about a response.

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Video Transcript

Which of the following best describes the role of receptors in the human body? (A) They transmit electrical impulses across synapses. (B) They transmit signals across the central nervous system. (C) They detect changes in the external environment. (D) They release hormones. Or (E) they bring about a response.

There are many different types of receptor in the human body. In the context of the nervous system, a receptor is a special type of nerve cell which can detect a stimulus. You may recall that a stimulus is a change in the external environment which the body responds to. For example, rods and cones are photoreceptors found in the eye which detect visual stimuli. And gustatory cells are taste receptors found in taste buds on the tongue and soft palate.

Once a receptor has detected a stimulus, it generates a nerve impulse, which is then carried down a series of neurons. This allows the impulse to be transmitted to an effector, such as a muscle or gland, which can then carry out the appropriate response.

We have therefore determined that the statement which best describes the role of receptors in the human body is (C). They detect changes in the external environment.

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