L09 - Pituitary

Question 1

Which hormones are produced in the anterior lobe of the pituitary gland?

Answer 1

1. ACTH
2. TSH
3. FSH/ LH
4. GH
5. Prolcatin

Question 2

Which hormones are produced in the posterior lobe of the pituitary gland?

Answer 2

1. ADH (vasopressin)

2. Oxytocin

Question 3

Which hormone produced in the hypothalamus stimulates the production/ secretion of GH?

Answer 3

GHRH

- Growth hormone releasing hormone

Question 4

Which hormone produced in the hypothalamus inhibits the production/ secretion of GH?

Answer 4

Somatostatin

Question 5

Which hormone produced in the hypothalamus stimulates the production/ secretion of FSH/ LH?

Answer 5

GnRH

- Gonadotropin releasing hormone

Question 6

Which hormone produced in the hypothalamus stimulates the production/ secretion of ACTH (adrenocorticotrophic hormone)?

Answer 6

CRH

- Corticotropin releasing hormone

Question 7

Which hormone produced in the hypothalamus stimulates the production/ secretion of TSH?

Answer 7

TRH

- Thyrotropin releasing hormone

Question 8

Which hormone produced in the hypothalamus inhibits the production/ secretion of prolactin?

Answer 8

Dopamine

Question 9

What is GH stimulated/ suppressed by?

Answer 9

• Released throughout life
• Pulsatile
  Stimulated by:
• Hypoglycaemia
• Exercise
• Sleep (peaks higher during sleep)
  Suppressed by:
• Hyperglycaemia

Question 10

Describe the positive feedback of GH

Answer 10

1. Hypothalamus secretes GHRH after stimulation from circadian rhythm, stress or cortisol fasting
2. GHRH stimulates prod and secretion of GH in the anterior pituitary
3. GH stimulates the liver and other tissues to release insulin-like growth factors
4. These insulin like growth factors stimulate cartilage growth, inc blood glc and bone/ tissue growth

Question 11

What does GH stimulate?

Answer 11

• Protein synthesis
• Lipolysis
• Glc metabolism