Chapter 7 Flashcards
(16 cards)
(2) hormones in the posterior pituitary
antidiuretic hormone (ADH) -arginine vasopressin oxytocin
primary function of antidiuretic hormone (ADH) -arginine vasopressin
increase renal absorption of water
secondary function of antidiuretic hormone (ADH) -arginine vasopressin
vasoconstriction, increase BP
physiological effect of antidiuretic hormone (ADH) -arginine vasopressin
blood pressure and blood volume
central diabetes in the decreased output of _______, which is associated with excessive urine output and thirst
ADH
______ can be caused by insufficient release of ADH by hypothalamus or by pituitary to release the ADH into bloodstream
central diabetes
physical characteristics of central diabetes insipidus
polyuria (excessive urination)
dilute urine
hypotension
increased plasma concentration
etiology of nephrogenic diabetes insipidus (2)
abnormalities in the kidney
caused by drugs (lithium)
kidneys fail to respond to ADH and cannot concentrate urine in:
nephrogenic diabetes insipidus
syndrome of inappropriate ADH secretion is due to excessive release of
ADH
fluid overload in patients (associated with syndrome of inappropriate ADH secretion) is caused by
strokes
head trauma
brain tumors
site of synthesis of oxytocin
paraventicular nuclei- hypothalamus
hormone that functions to stimulate milk release, stimulate parturition, stimulates uterine shrinkage (After birth)
oxytocin
secondary function of oxytocin
increase renal absorption of water
DECREASE memory
neurological impact of oxytocin
nerve impulses –stimulates smooth muscle contraction in uterus
“urge to push”
Ferguson’s reflex (caused by baby pushing on Ferguson’s Plexus of nerves)
