posterior pituitary

Question 1

posterior pituitary hormones
1. made by __ cell bodies in hypothalamus
2. transported to __ terminals in posterior pituitary

Answer 1

1. neuronal
2. axon

Question 2

neuronal action potentials release hormones (2)

Answer 2

oxytocin and anti diuretic hormone (vasopressin)

Question 3

function of oxytocin
1. strong stimulant of __ contraction
- distension of the __ and __ during labor promotes release

2. hormonal trigger for ___ ejection
   - in ___ mothers

Answer 3

1. uterine
   - cervix and uterus
2. milk
   - lactating

Question 4

function of antidiuretic hormone
1. inhibits or prevents __ formation
2. increased by low ___
a. targets __ collecting ducts —> reabsorb more ___
b. high concentrations —> ___ (increase blood pressure)

3. inhibited by __

Answer 4

1. urine
2. blood pressure
   a. kidney - filtrate
   b. vasoconstriction
3. alcohol

Question 5

ADH disorders

Answer 5

diabetes insipidus

syndrome of inappropriate ADH secretion (SIADH)

Question 6

diabetes insipidus
1. ADH deficiency due to ___ or __ pituitary damage
2. kidney insensitive to ___
3. excess ___
4. treatment =

TOO LITTLE

Answer 6

1. hypothalamic or posterior
2. ADH
3. urination
4. must keep well hydrated

Question 7

syndrome of inappropriate ADH secretion
1. retention of ___ (headache, disorientation)
a. leading to ___

2. treatment = fluid ___

TOO MUCH

Answer 7

1. fluid
   a. hyponatremia
2. restriction