Neuropophysis - Posterior Pituitary Flashcards
1
Q
Name the 2 hormones produced by the Neurohypophysis
A
ADH, Oxytocin
2
Q
What is ADH also known as
A
Vasopressin AKA arginine vasopressin
3
Q
What is ADH released in response to?
A
^ Na+ in blood (Hypernatremia)
4
Q
Define Hypernatremia. What is this caused by?
A
^ Na+ in blood
High dietary sodium or high Aldosterone levels
5
Q
What is the action of ADH? How does this occur?
A
Reabsorbs water in late distal convoluted tubule and collecting duct of nephron of kidney (Principal cells)
By inserting aquaporins in the membrane
6
Q
What does deficiency of ADH lead to? What is this termed?
A
Polyuria + Polydypsia
Diabetes Insipidus
7
Q
When (2) is oxytocin released?
A
In labor
During lactation
8
Q
What is the action (2) of Oxytocin?
A
Contracts uterus
Milk let-down
