PRACTICE QUESTIONS______
1. For most domestic species, the duration of spermatogenesis is approximately:
a. 120 days
b. 10 days
c. 60 days
d 6 months
e. 21 days.
2. Normal spermatogenesis in domestic mammals requires a testicular temperature that is:
a.
Higher than core body temperatureb. Lower than core body temperature
c. The same as core body temperature
d. Above freezing but below boiling
e. Conducive to testosterone metabolism
3. Normal spermatogenesis requires an Intratesticular testosterone concentration that is:
a. The same as circulating levels
b. Lower than circulating levels
c. Static and unchanging
d. Much higher than circulating levels
e. Able to change rapidly with the maturational stage of the spermatozoon
4. Puberty in the male:
a. Occurs at about the same time for all species.
b. Is influenced only by the age of the animal.
c. Is synonymous with sexual maturity.
d. Is defined as when he is first able to produce sufficient numbers of sperm to impregnate a female.
e. Is independent of GnRH secretion.
5. Anabolic steroids are testosterone derivatives and therefore:
a. Should be helpful in treating infertile males.
b. Have no effect on male fertility.
c. Enhance testicular function.
d. Are only approved for use in stallions.
e. Should not be used in males intended for breeding because of negative-feedback effects.