The Sympathetic Nervous System

question 51

Multiple Choice

The sympathetic nervous system

• A) keeps rage and death instincts under control.
• B) only operates during times of low stress.
• C) permits people to react with empathy to tragic situations.
• D) prepares the body to cope with a dangerous situation.
• E) relaxes the body and helps digestion.

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Definitions:

Receptors

Specialized cells or protein molecules that receive and transduce signals in the body and brain.

Fovea

A small depression in the retina of the eye where visual acuity is highest due to the concentration of cones.

Cones

Photoreceptor cells in the retina of the eye that function best in bright light and enable color vision.

Rods

Photoreceptor cells in the retina of the eye that are extremely sensitive to light and enable vision in low light conditions but do not perceive color.