Reproductive System Part 2

Question 1

Explain the cyclic variations in plasma hormones levels that occur during the menstrual cycle.

Answer 1

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Question 2

How do plasma hormones regulate the ovarian and uterine changes during the menstrual cycle?

Answer 2

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Question 3

what happens during fertilization?

Answer 3

Millions of sperm are deposited into the vagina during copulation.
Sperm swim to the uterus and uterine tubes
Capacitation occurs
Ova is fertilized

Question 4

what happens during implantation?

Answer 4

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Question 5

how does oogenesis differ from spermatogenesis with regard to the number of gametes produced? The timing of gamete production?

Answer 5

The number of oogonia is fixed prior to birth, instead of being continuously produced. Meiosis begins in fetal life and is only completed after fertilization.

Question 6

When does meiosis I and meiosis II in oogenesis?

Answer 6

Meiosis begins in fetal life and is only completed after fertilization.

Question 7

what are the two phases of the ovarian cycle? what happens during each phase?

Answer 7

Follicular phase- FSH and estrogen stimulate follicle growth and development, follicles develop into primordial folllicles, oocyte grows and granulosa cells proliferate, zona pellucida and antrum form, dominant follicle continues to develop and rest regress, corona radiata develops, and forms Graafian follicle, then ovulation.
Luteal phase-ovulation to menstruation

Question 8

what are the three phases of the uterine cycle? what happens during each phase?

Answer 8

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Question 9

During the first three months of pregnancy, estrogen and progesterone are secreted from _______.

Answer 9

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Question 10

During the last six months of pregnancy, estrogen and progesterone are secreted from ______.

Answer 10

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