The contractile structure that surrounds the pupil is the ________.

A. ciliary ring
B. iris
C. ciliary muscle
D. retina
E. sclera


Answer: B

Anatomy & Physiology

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Deep vein thrombosis, heart attack, and high blood pressure are all diseases of the ________ system. 

Fill in the blank(s) with the appropriate word(s).

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Postganglionic fibers that innervate targets in the body wall or thoracic cavity originate on neurons within

A) intramural ganglia. B) collateral ganglia. C) sympathetic chain ganglia. D) suprarenal ganglia. E) white rami communicantes.

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The vestibular complex is filled with

A) endolymph. B) plasma. C) CSF. D) perilymph. E) None of the answers are correct.

Anatomy & Physiology