Human pupil size can change in response to light availability. This happens in each eye as the iris, which is the colored part of the eye, expands and contracts to regulate the amount of light entering each pupil.
This response to stimuli is very important in protecting the eyes because although they need light to see, too much light can cause serious damage. Which of the following best describes the nervous system's role in changing pupil size in response to light?
A.
The nervous system voluntarily receives information from the brain which allows the eye muscles to perform the response.
B.
The nervous system receives and interprets sensory information from the eyes and signals the muscles of the eyes to perform the response.
C.
The nervous system works without the aid of other systems in order to provide a sufficiently rapid response.
D.
The nervous system is a network of electrical impulses that becomes activated after the muscles within the eyes perform the response.
1 answer