Fibers of muscles whose motor neurons are severed
A. die as their sarcomeres are progressively eliminated.
B. cannot ever be reinnervated.
C. may be replaced by fat or fibrous connective tissue.
D. hypertrophy.
Answer: C
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Answer the following statements true (T) or false (F)
1. The prostate atrophies as a man ages, and it usually causes no health problems. 2. The hormone oxytocin combines with enzymes in semen to enhance sperm motility. 3. When a couple is having difficulty conceiving a child, it is necessary to investigate the sperm of the male. 4. The amount of testosterone and sperm produced by the testes is dependent on the influence of FSH alone. 5. Ovarian follicles contain mature eggs.
The spleen clears the lymph that passes through it of bacteria and other foreign matter
Indicate whether the statement is true or false
Which statement is true about up-regulation and down-regulation?
A. Up-regulation is the increase in the number of receptors for a given hormone and down-regulation is the decrease in the amount of hormone. B. Up-regulation is the increase in the amount of hormone and down-regulation is the decrease in the amount of hormone. C. Up-regulation is the increase in the number of receptors for a given hormone and down-regulation is the decrease in the number of receptors for a hormone. D. Up-regulation is the decrease in the number of receptors for a given hormone and down-regulation is the increase in the number of receptors for a hormone.
Calcitonin is produced in the ________ gland.
Fill in the blank(s) with the appropriate word(s).