Contraction of the dartos muscle
A) tightens the scrotum.
B) produces an erection.
C) propels sperm through the urethra.
D) moves sperm through the ductus deferens.
E) initiates seminal emission.
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Question 2) Activation of which kind of receptor causes heart rate to increase?
A) alpha-one
B) beta-one
C) muscarinic
D) beta-two
E) preganglionic
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Question 3) Contraction of the cremaster muscles
A) tenses the scrotum.
B) pulls the testes closer to the body cavity.
C) propels sperm through the urethra.
D) moves sperm through the ductus deferens.
E) tenses the scrotum and pulls the testes closer to the body cavity.
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Question 4) Cardiac output is increased by
A) sympathetic stimulation.
B) increased end systolic volume.
C) decreased end diastolic volume.
D) decreased venous return.
E) inhibiting the atrial reflex.
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Question 5) A vasectomy would interfere with a man's ability to
A) secrete testosterone.
B) make sperm.
C) ejaculate.
D) produce semen.
E) deliver sperm to the ejaculatory duct.
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Question 6) Which of the following would cause stroke volume to increase?
A) when venous return is decreased
B) when ventricular contraction is reduced
C) drugs that stimulate beta-1 receptors
D) decrease in heart rate
E) decreased sympathetic stimulation
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Question 7) If the prostate stopped secreting fluid, this would result in semen
A) that lacked sperm.
B) with a higher than normal pH.
C) with less fructose.
D) with no mucus.
E) that was rich in prostaglandins.
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Question 8) Heart rate is controlled by neurons of the cardiovascular center located in the
A) pons.
B) thalamus.
C) medulla oblongata.
D) hypothalamus.
E) higher centers.
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Question 9) A typical ejaculation releases approximately ________ sperm.
A) 1 million
B) 250 million
C) 100,000
D) 20 million
E) 800 million
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Question 10) Cardiac output can be increased by all of the following except
A) decreasing ejection fraction.
B) decreasing end systolic volume.
C) increasing stroke volume.
D) increasing ejection fraction.
E) increasing heart rate.
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