When you are exposed to bright light, a reflex is initiated and your iris constricts to decrease pupil size.  Which structure serves as a receptor in this system?

A. The iris
B. The brain's visual cortex
C. The retina
D. The eyelid


Answer: C

Anatomy & Physiology

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What is the function of the inferior colliculi?

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Select all that are true when a muscle fiber is at rest.A) There is a charge difference across the sarcolemma.B) Sodium-potassium pumps are active.C) Calcium is stored in the sarcoplasm.D) ACh receptors are open.

What will be an ideal response?

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Which of the following is considered part of the axial skeleton?

a. Femur b. Hyoid bone c. Phalange d. Tibia

Anatomy & Physiology