What is the purpose of photoreceptors?(1 point)
Responses
A.They contract and relax to control the pupil.
B. They focus the light coming into the eye.
C. They change light to electrical signals.
D. They receive light and turn it into an image.
C. They change light to electrical signals.
The purpose of photoreceptors is to change light to electrical signals. To determine the correct answer, we can examine the function of photoreceptors and how they work.
Photoreceptors are specialized cells found in the retina of our eyes. Their main role is to capture light and convert it into electrical signals that can be interpreted by the brain. These electrical signals are then transmitted to the brain through the optic nerve, allowing us to perceive and interpret visual information.
Option A states that photoreceptors contract and relax to control the pupil. However, the contraction and relaxation of the pupil are controlled by a different set of muscles called the iris muscles, not the photoreceptors.
Option B suggests that photoreceptors focus the light coming into the eye. However, the focusing of light is primarily done by another component of the eye called the lens, not the photoreceptors.
Option D states that photoreceptors receive light and turn it into an image. While it is true that photoreceptors receive light, they do not turn it into an image themselves. The image formation is a complex process that involves multiple parts of the eye, including the lens and the brain.
Therefore, the correct answer is option C: photoreceptors change light to electrical signals.
The purpose of photoreceptors is to:
C. They change light to electrical signals.