Which of the following is an androgen?
A. Follicle-stimulating hormone (FSH)
B. Luteinizing hormone (LH)
C. Progesterone
D. Testosterone
E. Estrogen
Answer: D
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Which is the neurotransmitter that causes the release of calcium ions from reservoirs within the muscle cell and thereby initiates the steps of contraction?
A. Acetylcholinesterase B. Acetylcholine C. Serotonin D. Norepinephrine
Where are the cardiac, vasomotor, and respiratory centers found?
A. Medulla oblongata B. Pons C. Midbrain D. Spinal cord E. Diencephalon
When the wrist is flexed, the finger flexors cannot produce as tight a fist as when the wrist is in a neutral position. This is an example of what?
A. active insufficiency B. passive insufficiency C. both A and B D. none of the above
Answer the following statements true (T) or false (F)
1. The male urethra serves the urinary system only. 2. Both tetrads and crossovers are seen during meiosis. 3. Failure to attain erection is called impotence. 4. Ovulation occurs near the end of the ovarian cycle. 5. The corpus luteum secretes progesterone only.