02.1 The HPG Axis

Question 1

Which part of the pituitary gland is under neural control?

Answer 1

Posterior

Question 2

Which part of the pituitary gland is under hormonal control?

Answer 2

Anterior

Question 3

What hormones does the posterior pituitary gland secrete?

Answer 3

ADH

Oxytocin

Question 4

What hormones does the anterior pituitary gland secrete?

Answer 4

Prolactin
Growth Hormone
TSH
ACTH
FSH
LH

Question 5

Which hormone stimulates the anterior pituitary to secrete FSH/LH?

Answer 5

GnRH

Question 6

Where do LH and FSH act?

Answer 6

Gonads

Question 7

Where is inhibin secreted from?

Answer 7

Gonads

Question 8

What does inhibin negatively feedback on?

Answer 8

FSH Secretion specifically

Question 9

What does testosterone negatively feedback on?

Answer 9

GnRH

Question 10

How do moderate amounts of oestrogen feedback?

Answer 10

Negatively on GnRH

Question 11

How do high levels of eostrogen alone feedback?

Answer 11

Positively on GnRH (LH Surge)

Question 12

How does progesterone affect oestrogen feedback?

Answer 12

It prevents GnRH secretion

Question 13

In females, which cells secrete inhibin?

Answer 13

Granulosa cells

Question 14

In females, which cells secrete oestrogen?

Answer 14

Theca interna

Question 15

In males, where does LH and FSH act respectively?

Answer 15

Leydig cells, Sertoli cells

Question 16

Which cells secrete inhibin and what hormone is this in response to?

Answer 16

Sertoli cells/granulosa cells in response to FSH