Carlos and his wife have been trying for years to have a baby, with no success. Carlos has always assumed they've just had bad timing. But
recently they started tracking Maria's cycle and found that everything seemed to be on schedule. Finally, at Maria's request, they make an appointment with an infertility specialist. Carlos is expecting the doctor to order expensive tests. But after the introductions, one of the first things the doctor asks about is what kind of underwear Carlos wears. "What business is that of yours?" Carlos thinks. Then the spe-calist adds, "Because that may affect the average temperature of the testes."
1. Sperm production occurs optimally at what temperature?
a. 3° C above body temperature
b. At body temperature
c. 3° C below body temperature
d. Optimal temperature changes with the seasons
Next, Carlos is asked to provide a sperm sample. "We're going to analyze the sperm count and morphology," says the doctor.
2. What number should Carlos's sperm count be above for that factor to be ruled out as a cause of the couple's infertility?
a. 250 million/mL.
b. 25 million/mL
c. 2,500/mL
d. 250/mL
3. Which is the correct pathway the sperm would take during ejaculation?
a. Seminiferous tubule, rete testi, efferent ductules, epididymis, vas deter. ens, ejaculatory duct, urethra
b. Rete testis, seminiferous tubules, efferent ductules, epididymis, vas deter. ens, urethra, ejaculatory duct
c. Epididymis, vas deferens, seminiferous tubules, rete testis, ejaculatory duct, urethra
d. Seminiferous tubules, rete testis, epididymis, vas deferens, efferent duct-ules, urethra, ejaculatory duct
4. What hormone directly stimulates sperm production?
a. Estrogen
b. Progesterone
C. LH
d. Testosterone