Which of the Following Is True of Photoreceptors in the Retina

question 22

Multiple Choice

Which of the following is true of photoreceptors in the retina?

• A) They contain opsin proteins that participate in visual signal transduction.
• B) They respond to a light stimulus by depolarizing rather than hyperpolarizing.
• C) They fire action potentials.
• D) All of the above are true.

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Definitions:

Bromoacetone

An organic compound with the formula C3H5BrO, used in the past as a tear gas.

Bromodiiodomethane

A halogenated methanol compound with the formula CH2BrI2, often used in organic synthesis and as a dense fluid for mineral separation.

Necessary Reagents

Specific chemicals required to carry out a particular chemical reaction.

Acid-Catalyzed Halogenation

A chemical reaction where a halogen is introduced into an organic molecule with the aid of an acid catalyst.