Your Friend Has Trouble Distinguishing the Color Red from the Color

question 11

Multiple Choice

Your friend has trouble distinguishing the color red from the color green. You explain that he is color-deficient because his eyes

• A) are too elongated or have a cornea that is too round.
• B) were damaged by bright sunlight.
• C) have larger blind spots than normal.
• D) have rods but no cones.
• E) do not have the photopigments stimulated by red or green light.

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Definitions:

Excitatory Messages

Neurological signals that increase the likelihood of a neuron firing and thus stimulate action in the nervous system.

Inhibitory Message

A neurological or psychological signal that reduces or prevents certain actions, thoughts, or feelings.

Refractory Period

A resting period after orgasm, during which a man cannot achieve another orgasm.

Axon

A long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.