afferent vs efferent arteriole Flashcards
1
Q
kidney secretes
A
- renin in the circulation
- it its a circulating enzyme
- active form of vit D reabsorb calcium and phosphate in the gut 1, 25 dihydroxy
- erythropoietin
2
Q
kidney secrets waste product
A
- urea
- creatinine
- less uric acid
3
Q
nephron is located in
A
- cortex
4
Q
loops of henle
A
- function is to create osmolar gradient
5
Q
cortex
A
- proximal tubule - consume most ATP utilized by the kidney
- bowman’s capsule
- distal tubule- macula densa
- most metabolically active region
6
Q
medulla
A
outer zone
inner zone
7
Q
outer zone of the medulla
A
- collecting duct
- ADH
- reabsorption of water
8
Q
inner zone of the medulla
A
- loop of henle
- MOST SUSCEPTIBLE TO ISCHEMIA
9
Q
INCREASE BP
A
- kidney COSTRICTS to maintain renal blood flow
- at the afferent arterioles
10
Q
DECREASE BP
A
- kidney DILATES to maintain blood flow
11
Q
myogenic response to smooth muscle stretch
A
- greater constriction to main flow if changing in perfusion pressure
12
Q
glomerular tubular feedback
A
- increase GFR deliver more NaCl to the distal tubule
- monitored by macula densa signal adenosine to control the resistance of the afferent arteriole (constriction) making GFR normal
13
Q
macula densa regulates
A
- blood flow
- GFR
14
Q
dilation of middle of renal series circuit
A
- lower over all resistance
- flow increases
- upstream pressure goes down
- downstream pressure goes up
15
Q
constrict of middle renal series circuit
A
- flow decreases
- upstream pressure goes up
- downstream pressure goes down
