Spermatogenesis a. Begins with the mitotic division of a single ovum b. Results

Question

Spermatogenesis a. Begins with the mitotic division of a single ovum b. Results in four primary spermatocytes for every spermatogonium c. Results in four spermatozoa for every primary spermatocyte d. Results in a single spermatozoon for every primary spermatocyte which of the following would be likely to occur in an adult male whose Sertoli cells have begun to produce excessive amounts of inhibin? a. FSH secretion would be selectively inhibited, but LH secretion would be normal b. Spermatogenesis would be depressed but testosterone secretion would be normal c. Spermatogenesis would be enhanced because of the elevated production of testosterone amounts of inhibin? d. A & B e. A & C Menstrual cycles a. Refer to events that occur in the uterus and ovaries b. Are caused by changes in hormone levels c. For the average woman, repeat every 28 days d. All of the above are correct The maturation of ovarian follicles a. Promotes the maturation of the oocyte so that it can be fertilized after ovulation b. Results in the secretion of estrogen, which stimulates the LH surge that in turn causes ovulation c. Culminates with the second meiotic division of the egg d. A & B e. All of the choices are correct In the two-cell mechanism that results in greater secretion of estrogen from the follicle a. Granulosa cells synthesize an androgen which the theca cells convert to estrogen b. Sertoli cells synthesize an androgen which the granulosa cells convert to dihydrotestosterone c. Production of progesterone by the corpus luteum requires cooperative interaction between 2 cell types d. Theca cells synthesize an androgen which the granulosa cells convert to estrogen The follicular phase of the ovarian cycle coincides with which phase or phases of the uterine cycle? a. The menstrual phase b. The proliferative phase c. The secretory phase d. The last half of the proliferative and the first half of the secretory phases e. A & B On day 14 of a typical 28-day menstrual cycle, LH levels will be _____. The endometrium will be _____. Estrogen levels in the blood are _____. a. Level: sloughing off, low b. At or near a peak: near the end of the proliferative phase: relatively high c. Low but rising: in the secretory phase: high d. At or near a peak: in the secretory phase: low e. Level: starting the proliferative phase: level but high

Explanation / Answer

28. Spermatogenesis is formation of sperms by the meosis division from spermatogonium to four spermatocytes. So ans is b

29. Inhibin is an endocrine hormone which stimulate release of follical stumilating hormone and lead to process called spermatogenesis. Since all are linked processes so ans is d.

30. Menstural cycle is a 28 days body cell in women in which ovum is released from ovaries and to nurture it uterus prepare it self and after no success of fertilization this muscles of uterhs shed out as bleeding. And this is mainly due to hormonal chances. So ans is d.

31. Follicals of overy matures the ovum in overy and also secrets hormone so ans is d.

32. Ans is a.

33. Folicular phases coincide with proliferative phase. Ans is a dog food

34 on 14 th day estrogen and lh both have problems.

35 both the drugs are look log samjhz la bcouse... So ans is b

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