Lecture27

Question 1

What is Oogenesis?

Answer 1

• Formation and development of the oocyte (female gamete)

rom oogonia

Question 2

what do oocytes develop in?

Answer 2

Follicles which develop as the oocyte does.

Question 3

How many oocytes does a female have left when she starts puberty?

Answer 3

around 3000,000

Question 4

Where is GnRH secreted?

Answer 4

Hypothalamus

Question 5

Where is FSH and LH hormones secreted?

Answer 5

Anterior Pituitary

Question 6

Where is Estradiol and inhibin released?

Answer 6

Ovaries (follicle)

Question 7

Where is Inhibin and progesterone released?

Answer 7

Ovary (corpus luteum)

Question 8

Role of GnRH hormone?

Answer 8

Stimulates the release of FSH and LH

Question 9

What is the role of FSH hormone?

Answer 9

Stimulates the growth of ovarian follicles.

Question 10

Role of LH hormone?

Answer 10

Surge of LH involved in ovulation, formation of corpus

luteum.

Question 11

Role of Estradiol?

Answer 11

Assists follicle growth (with FSH); bone and muscle growth; endometrial growth; secondary sex characteristics; feedback to anterior pituitary

Question 12

Role of Inhibin?

Answer 12

Negative feedback to anterior pituitary to suppress

FSH.

Question 13

Role of progesterone?

Answer 13

Negatively feeds back to suppress GnRH (therefore LH and FSH); endometrial maturation; maintains pregnant state

Question 14

Menstrual cycle?

Answer 14

The regular cyclic
changes in the ovary
and uterus that
prepare an oocyte/ova
for fertilisation and the
endometrium for
embryo implantation.

Question 15

What are the two phases of the reproductive cycle?

Answer 15

• Follicular (preovulatory phase): Day 1 - 14

* Luteal (postovulatory phase): Day 15 - 28