misc questions Flashcards
What happens to P(GC), GFR if..
renal artery pressure increases?
P(GC) inc.
GFR inc
What happens to P(GC), GFR if..
afferent arteriole (AA) resistance increases?
P(GC) dec
GFR dec
What happens to P(GC), GFR if..
AA resistance decreases?
P(GC) inc
GFR inc
What happens to P(GC), GFR if..
EA resistance decreases?
P(GC) dec
GFR dec
What happens to GFR if..
oncotic pressure of GC decreases?
GFR inc
What happens to GFR if..
P(BS) increases?
GFR dec
What happens to GFR if..
oncotic BS increases?
GFR inc (but bad! unhealthy kidney)
Aldosterone promotes ____ via ___ in _____
Na+ reabsorption via ENaC in collecting duct
Angiotensin II stimulates what transporters for Na+ reabsorption and where?
@ PT, TAL: NHE3
@ DT, CD: NaCC, EnAc
In the tubuloglomerular feedback mechanism:
a) a decrease in NaCl sensed by the macula densa results in dilation of the afferent arteriole
b) an increase in NaCl sensed by the macula densa results in constriction of the efferent arteriole
c) renin secretion is increased in response to an increase in NaCl sensed by the macula densa
d) an increase stretch of the afferent arterioles causes them to constrict
a) a decrease in NaCl sensed by the macula densa results in a dilation of the afferent arteriole
to increase flow!
b - afferent arteriole
An individual training for a marathon loses 5 lbs of water mostly by sweating during a 12 mile run which increases plasma osmolarity from 290 to 295 mOsm/L. Which of the following is true? This increase in osmolarity is sufficient to directly:
a) stimulate renin secrete from the posterior pituitary
b) stimulate ANP secretion from heart atrial tissue
c) stimulate ADH secretion from the posterior pituitary
d) stimulate aldosterone secretion from the adrenal gland
c) stimulate ADH secretion from the posterior pituitary
ADH release is very sensitive to plasma osmolarity
