11 How do you make DHT? Select one: a. Convert progesterone to testosterone, and

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11 How do you make DHT?

Select one:

a. Convert progesterone to testosterone, and then testosterone into DHT

b. Convert testosterone to estradiol, and then estradiol into DHT

c. Convert cortisol into estradiol, and then estradiol into DHT

d. Convert progesterone into cortisol, and then cortisol into DHT

Question 12

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12 When are estrogen levels highest during a woman's menstrual cycle?

Select one:

a. Early in the follicular phase, just after menstruation

b. At the end of the luteal phase, just prior to menstruation

c. A couple of days prior to ovulation

d. During menstruation

Question 13

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13 When does positive feedback cause a surge in LH levels during the menstrual cycle?

Select one:

a. At the end of the follicular phase, around the time of ovulation

b. At the start of menstruation

c. During the middle of the luteal phase

d. The middle of the follicular phase

Question 14

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14 Which enzyme is responsible for the conversion of testosterone to estradiol?

Select one:

a. 5-reductase

b. P450scc

c. Aromatase

Question 15

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15 What would happen to a man's GnRH and testosterone levels if you removed his pituitary gland?

Select one:

a. His GnRH and testosterone levels would decrease

b. His GnRH and testosterone levels would increase

c. His GnRH levels would decrease and testosterone levels would increase

d. His GnRH levels would increase and testosterone levels would decrease

Explanation / Answer

11-a,dehydrotestosterone/DHT is synthesized from Progesterone which in middle pathway becomes testosterone.

12-c, couple of days prior to Ovulation,the levels of estrogen goes highest.

13-a,LH surge occures around 36 hours before Ovulation that's the end of follicular phase.

14-c,Aromatase enzyme converts testosterone to estradiol.

15-a,both of these Hormones will decrease in body.

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