A structure that allows the middle ear to communicate with the nasopharynx is the

A) pinna.
B) vestibular duct.
C) tympanic duct.
D) auditory tube.
E) external auditory canal.


D) auditory tube.

Anatomy & Physiology

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Which of the following statements is correct regarding the red and white locomotor muscles of fish?

A) White muscle exhibits maximal power output at lower tail-beat frequencies. B) Fish tend to use red muscle for slow, often continuous swimming. C) Red muscle tends to be more glycolytic. D) Red muscle shows maximal power output at high tail-beat frequencies.

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If a vaccine is given to most people in a population, it can halt an infection because of

A. herd immunity. B. people keeping away from each other. C. bovine immunity. D. an epidemic of autoimmunity.

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Which is not correct about spongy bone?

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