Posterior Pituitary Hormones Flashcards
(30 cards)
Oxytocin is produced in _______ and ______.
supraoptic nucleus and paraventricular nuclei of the hypothalamus
Primary functions of oxytocin
stimulate milk release, stimulate parturition, and stimulate uterine shrinkage after birth
Secondary functions of oxytocin
increase renal reabsorption of water and decrease memory
What effect does oxytocin have on the uterus?
myometrium OT stimulates smooth muscle contraction. (neurological)
According to Martin, oxytocin is more than just a “love” hormone. it may also do what?
May improve social functioning in children with autism spectrum disorders. Findings were mixed.
Oxytocin was found to _____ the intake of high sugar snacks in men.
reduce
In bulimia nervosa oxytocin is implicated in the ____________.
modulation of reward
Epigenetic modification of oxytocin receptor gene influences ___________.
social behavior (anger and fear)
Antidiuretic Hormone (ADH) is also known as:
Vasopressin, arginine vasopressin and argipressin
Site of Synthesis of ADH
Supra-optic nuclei - hypothalamus - secreted through posterior pituitary.
Primary Function of ADH
regulate bodys retention of water
Physiological control of secretion of ADH
blood pressure and blood volume
The potential use of ADH is to ________.
limit cerebral edema in patients after acute stroke
central diabetes is the ______ output of ADH.
decreased
Effects of ADH on central diabetes insipidus is ____ and ______.
Excessive urine output (polyuria) and excessive thirst.
Central diabets insipid us can be caused by _____________ by hypothalamus or by pituitary release ADH into the _________.
insufficient release of ADH; bloodstream
Central diabetes insipidus is caused by ________.
deficiency of ADH
Physical Characteristics of central diabetes insipidus:
polyuria, dilute urine (decreased urine concentration), hypotension (decreased plasma volume), and increased plasma concentration .
Compensation for central diabetes insipid us
increased aldosterone secretion and increased renal reabsorption of sodium excretion of hydrogen and potassium ions which brings blood pressure back toward normal.
Aldosterone is produced by the _______.
renal cortex
Function of aldosterone
act on the distal tubules and collecting ducts of the kidney, increase reabsorption of water and electrolytes in kidneys, and increases blood volume and blood pressure.
Etiology of nephrogenic diabetes insipid us
abnormalities in the kidneys
Physical characteristics of nephrogenic diabetes insipidus
pollyuria, dilute urine (decreased urine concentration), hypotension (decreased plasma volume), and increased plasma concentration.
Physical characteristics of nephrogenic diabetes insipidus
polyuria, dilute urine (decreased urine concentration), hypotension (decreased plasma volume), and increased plasma concentration.
