Which of the following best describes the orbicularis oris?
A) It draws the eyebrows together.
B) It pulls the lower lip down and back.
C) It closes, purses, and protrudes the lips.
D) It allows blinking and squinting of the eyes.
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Question 2) The muscle that compresses the cheeks when you are eating or sucking on a straw is the ________.
A) zygomaticus
B) platysma
C) masseter
D) buccinator
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Question 3) A muscle group that works with and assists the action of a prime mover is a(n) ________.
A) fixator
B) antagonist
C) synergist
D) agonist
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Question 4) Spermatogenesis involves the ________.
A) formation of haploid sperm
B) formation of four haploid cells from a spermatogonium
C) movement of sperm into the genital tract
D) None of the listed responses is correct.
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Question 5) Your little brother just stuck his tongue out at you. Which tongue muscle did he use?
A) orbicularis oris
B) genioglossus
C) stylohyoid
D) hyoglossus
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Question 6) Human egg and sperm are similar in that they ________.
A) have the same degree of motility
B) are produced in similar numbers each month
C) have the same number of chromosomes
D) are about the same size
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Question 7) What structure transports both urine and semen from the penis?
A) ductus deferens
B) urethra
C) seminal vesicles
D) None of the listed responses is correct.
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Question 8) What is the enlarged structure at the tip of the penis?
A) corona
B) glans
C) prepuce
D) body
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Question 9) Which of the following describes the suprahyoid muscles?
A) None of the listed responses is correct.
B) They depress the larynx and hyoid bone if the mandible is fixed.
C) They move the pharynx superiorly while swallowing.
D) They are a group of muscles that originate superior to, and act on, the hyoid bone.
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Question 10) The muscle that provides the major force for producing a specific movement is called the ________.
A) antagonist
B) agonist
C) synergist
D) origin
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