bio exam - Department of Biological Sciences Clark Atlanta...

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Department of Biological Sciences Clark Atlanta University Biol 112, General Biology II Exam IV, Fall 2010 1. At the time of fertilization, the complete maturation of each oogonium has resulted in a. one secondary oocyte b. two primary oocytes c. four secondary oocytes d. four primary oocytes e. four zygotes 2. In vertebrates, spermatogenesis and oogenesis differ, in that a. oogenesis begins at the onset of sexual maturity, whereas spermatogenesis happens in embryonic development b. oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional spermatozoon c. cytokinesis is unequal in oogenesis, whereas it is equal in spermatogenesis d. oogenesis ends at menopause, whereas spermatogenesis is finished before birth e. Spermatogenesis is not complete until after fertilization occurs, but oogenesis is complete by the time a girl is born. 3. The primary difference between estrous and menstrual cycles is that a. the endometrium shed by uterus during the estrous cycle is reabsorbed but the shed endometrium is excreted from the body during the menstrual cycle b. behavioral changes during estrous cycles are much less apparent than those of menstrual cycles c. season and climate have less pronounced effects on estrous cycle than they do on menstrual cycles d. copulation normally occurs across the estrous cycles, whereas in menstrual cycles copulation only occurs during the period surrounding ovulation e. most estrous cycles are of much longer duration compared to menstrual cycles. 4. This hormone is secreted from a structure in the brain a. testosterone b. estradiol c. progesterone d. follicle stimulating hormone e. gonadotropin-releasing hormone 1
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5. A contraceptive pill that continuously inhibits the release of GnRH from he hypothalamus will a. increase the production of estrogen and progesterone by the ovaries b. initiate ovulation c. reduce the secretion of gonadotropins from the anterior pituitary gland d. stimulate the secretion of LH and FSH from the posterior pituitary gland e. increase the flow phase of the menstrual cycle. 6. A primary response by the Leydig cells in the testes to the presence of luteinizing hormone is an increase in the synthesis and secretion of a. Inhibin b. Testosterone c. Oxytocin d. prolactin e. progesterone 7. A woman in the final week of pregnancy who is given an injection of oxytocin would likely a. undergo the loss of oxytocin receptors from her uterine smooth muscle cells b. stop secreting prostaglandins from the placenta c. undergo vigorous contractions of her uterine muscles d. increase the synthesis and secretion of progesterone e. be prevented from lactation. 8. Which hypothalamic hormone triggers the secretion of FSH? a.
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This note was uploaded on 12/03/2010 for the course BIO 112 taught by Professor Anaba during the Spring '10 term at Clark Atlanta.

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bio exam - Department of Biological Sciences Clark Atlanta...

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