26. Describe the role of progesterone in priming the uterus for the early stages

Question

26. Describe the role of progesterone in priming the uterus for the early stages of pregnancy (4pts)

27. T or F FSH is directly required for corpus luteum formation and maintenance

29. T or F   Human chorionic gonadotropin is structurally similar to LH and is usually first detectable 20 days after fertilization.

30. Which of the following is true of the menstrual cycle?

During the menstrual phase of the cycle, estradiol and progesterone levels are low, FSH and LH levels are high, and the lack of FSH results in sloughing of the uterine lining

During the follicular phase of the cycle, FSH secretion precedes LH secretion; levels of estradiol provide feedback regulation of both FSH and LH and thereby regulate ovulation

During the luteal phase of the cycle, high levels of progesterone are responsible for increased thickening of the uterine lining; continued maintenance of high levels of FSH assist in maintenance of the corpus luteum.

37. The mechanism of action of A23187 includes which of the following?

Opening of plasma membrane H+ channels to permit a rise in intracellular pH

Blockade of Na+ channels to permit a rise in intracellular K+

Opening of plasma membrane Ca+ channels to facilitate plasma membrane fusion events

None of the above

38, 39. What is the Whitten effect? Is there a comparable effect in other species? (4)

40. T or F Morphologically abnormal sperm are a normal part of the human ejaculate.

41. T or F Severe oligospermia may be an indication for ICSI.

46. Which of the following is the correct sequence of events?

Fertilization, cleavage, morula, blastula, gastrula, neurula

Fertilization, cleavage, blastula, morula, gastrula, neurula

Day 7 post-fertilization, implantation. Day 14, establishment of anterior/posterior, right left axis

Day 7 post-fertilization, formation of inner cell mass. Day 14, establishment of circulation.

A and C

A and D

None of the above

47. T or F Chlamydia and syphilis are the most common sexually transmitted diseases.

49. What are James Bond's lifestyle risk factors for sexually transmitted diseases? (4pts)

50. T or F There is no program to assist HIV positive individuals who have limited or no health coverage.

51. Which of the following is true?

The embryonic period is sensitive to major morphological abnormalities, while the fetal period is sensitive to physiological defects

The fetal period is sensitive to major morphological abnormalities, while the embryonic period is sensitive to physiological defects

Prior to implantation, the embryo is extremely sensitive to teratogens, but not very sensitive to mutagens

Smoking during pregnancy can result in severe fetal chromosomal abnormalities

52. Gynecologic complications of STDs include ______________________________ and _______________________________.

Explanation / Answer

26-progesterone help in thickening of endometerium and nourishing the uterine wall . It uterine movement and new ovarian follicle .the major changein endometrial gland become sexretory . And anchoring blastocyst if fertilization take place.

27- true

28-true

Note - follicle stimulating hormone help in proliferation of follicle .

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