Posterior pituitary hormones, thyroid and

Question 1

Where are hormones synthesized in the posterior pituitary?

Answer 1

Hypothalamus

Question 2

What cells in the hypothalamus synthezise posterior pituitary hormones?

Answer 2

-Paracentricular nucleus

or

• Supraoptic nucleus

Question 3

Where are posterior pituitary hormones secreted?

Answer 3

Posterior pituitary gland

Question 4

What are the two posterior pituitary hormones?

Answer 4

• Antidiuretic hormone (ADH)

- Oxytocin (OT)

Question 5

Where is ADH synthesized in the hypothalamus?

Answer 5

Supraoptic nucleus

Question 6

What is the target tissue of ADH

Answer 6

Kidneys, sudoriferous glands, arterioles

Question 7

What is the function of ADH?

Answer 7

DECREASES urine production by stimulating the kidneys to return more water back to the blood

Question 8

What stimulates the secretion of ADH?

Answer 8

DEhydration or high blood osmotic pressure

Question 9

Where is Oxytocin synthesized in the hypothalamus?

Answer 9

Paraventricular nucleus

Question 10

What is the target tissue of oxytocin?

Answer 10

Uterus- during labor

mammary glands - after labor

Question 11

What stimulates the release of oxytocin in the uterus during labor?

Answer 11

stretching of the uterus

Question 12

What type of process is the secretion of oxytocin?

Answer 12

Positive feed back cycle

*OT levels will keep increasing until baby is removed from uterus (no more stretching)

Question 13

What stimulates the release of oxytocin after labor?

Answer 13

suckling and hearing baby’s cry -> muscle contraction and milk ejection