Estrogen may play a role in spermatogenesis, as evidenced by estrogen receptors found on developing ________.
A. uterine
B. Leydig cells
C. testes
D. sperm cells
Answer: D
Anatomy & Physiology
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Epinephrine causes bronchial relaxation.?
Indicate whether the statement is true or false
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The first cervical vertebrae is the
A. occipital. B. axis. C. clavicle. D. atlas. E. mastoid.
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Which organelle produces most of the cell's energy?
A. Centriole B. Mitochondrion C. Ribosome D. Lysosome E. Nucleus
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