81 What is the most important mechanism through which combined oral contraceptiv

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81 What is the most important mechanism through which combined oral contraceptives prevent pregnancy?

Select one:

a. Making cervical mucus more abundant

b. Impairing implantation of the blastocyst into the endometrial lining of the uterus

c. Causing the endometrial lining to be sloughed off and inducing menstruation

d. Blocking the mid-cycle surge in LH and preventing ovulation

Question 82

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82 Which hormone is higher after menopause than before?

Select one:

a. Estradiol

b. Aldosterone

c. Progesterone

d. FSH

Question 83

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83 Hot flashes in postmenopausal women are correlated with surges in which of the following hormones?

Select one:

a. Estradiol

b. Testosterone

c. LH

d. FSH

Question 84

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84 Andropause in men is associated with a decline in androgen levels. Do older men (older than 60) typically have testosterone levels that are below the normal range?

Select one:

a. Yes

b. No

Question 85

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85 When is the average age for menopause in American women?

Select one:

a. 51

b. 43

c. 55

d. 47

Explanation / Answer

81) D Inhibition of follicular development and lack of an LH surge prevent ovulation inturn preventing pregnancy.

82. D)Apart from the fact that, a high FSH can be a sign that perimenopause has begun, a single FSH reading isn't a reliable indicator because day-to-day hormone levels can fluctuate dramatically.

83. c)Hot flashes also occur with low testosterone levels,high FSH (follicle stimulating hormone), surges of LH (luteinizing hormone).

84. yes,With increasing age, a greater number of men have total testosterone levels just below the normal range or in the low-normal range.

85. a) In the United States (U.S.), the average age for menopause is 51 years.

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