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.
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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.
Which is not correct about spongy bone?
A. Its spaces hold red bone marrow. B. It is located deep to compact bone. C. It forms diploe in the cranial bones. D. It is composed of tubular units called osteons. E. It is located in the epiphyses of long bones.
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.
What is the role of myosatellite cells?
A. They provide a source of calcium B. They repair damaged muscle tissue C. They produce ACh receptors D. They lead to relaxation of muscle