Which structure caps the head of a mature sperm and enables the sperm to penetrate an egg?
A. Nucleus
B. Axoneme
C. Flagellum
D. Acrosome
E. Mitochondria
Answer: D
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What term is used to describe the steady-state value for any variable that the body attempts to maintain?
A. Median value B. Equilibrium potential C. Set point D. Reflex arc E. Error signal
Which of the following are produced through meiosis?
A. Sexual cells B. Exact copies of cells C. Zygotes D. Androgens
What vitamin does parathyroid hormone enhance activation of in the kidneys?
a. vitamin A b. vitamin B6 c. vitamin C d. vitamin D e. vitamin E
Which of the following is the proper sequence of the menstrual (uterine) cycle?
a. menstrual phase, secretory phase, proliferative phase b. menstrual phase, proliferative phase, secretory phase c. proliferative phase, menstrual phase, progestational phase d. menstrual phase, proliferative phase, progestational phase e. proliferative phase, secretory phase, menstrual phase