Posterior pituitary hormones, thyroid and Flashcards Preview

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Flashcards in Posterior pituitary hormones, thyroid and Deck (13)
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1
Q

Where are hormones synthesized in the posterior pituitary?

A

Hypothalamus

2
Q

What cells in the hypothalamus synthezise posterior pituitary hormones?

A

-Paracentricular nucleus

or

  • Supraoptic nucleus
3
Q

Where are posterior pituitary hormones secreted?

A

Posterior pituitary gland

4
Q

What are the two posterior pituitary hormones?

A
  • Antidiuretic hormone (ADH)

- Oxytocin (OT)

5
Q

Where is ADH synthesized in the hypothalamus?

A

Supraoptic nucleus

6
Q

What is the target tissue of ADH

A

Kidneys, sudoriferous glands, arterioles

7
Q

What is the function of ADH?

A

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

8
Q

What stimulates the secretion of ADH?

A

DEhydration or high blood osmotic pressure

9
Q

Where is Oxytocin synthesized in the hypothalamus?

A

Paraventricular nucleus

10
Q

What is the target tissue of oxytocin?

A

Uterus- during labor

mammary glands - after labor

11
Q

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

A

stretching of the uterus

12
Q

What type of process is the secretion of oxytocin?

A

Positive feed back cycle

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

13
Q

What stimulates the release of oxytocin after labor?

A

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