Which embryonic structure gives rise to the ductus deferens?
A. Paramesonephric duct
B. Yolk sac
C. Urogenital sinus
D. Gonadal ridge
E. Mesonephric duct
Answer: A
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Which of the following events occurs in an erection?
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Indicate whether the statement is true or false
What is the most effective means of increasing alveolar ventilation?
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