Team Aug......Aug 23rd....few more days 2 go:) - genius123

[ArchivalUser]

ok good question.........
sympathetic stimulat==>renin increase===>

so i will go for AA?
PLS CAN U SEND THE EXPLANITON ?

[ArchivalUser]

d?

[ArchivalUser]

OK zkadhem ur doing great here it is...



A. Sympathetic stimulation to the kidney promotes the forces of reabsorption.
The lower renal plasma flow tends to increase filtration fraction and thus the plasma
oncotic pressure in the peritubular capillaries, a force promoting reabsorption. The constriction of the afferent and efferent arterioles will decrease peritubular capillary pressure,
a force promoting filtration. Even though the filtration fraction tends to increase, GFR
will decrease because of the drop in glomerular capillary hydrostatic pressure.

[ArchivalUser]

ok thank you drkap ...well there is something i like to add

in the kidnye there r alpha and B1 sympathetic receptors alpha receptors stimulation will lead to the decrease in renin sec while the B1 receptor stimulation will lead to INCREASE in renin secretion

NOW when r we gonna to have either of these receptors stimulated?

as it is written in kaplan ====>low dose stimulation will result in B1 stimulationas these receptors are more sensetive to the stimuli

HIGH DOSE OF A STIMULANT====>ALPHA RECEPTOR STIMULATION

HOPE THIS WILL HELP AND WILL STAY IN MIND !!!

[ArchivalUser]

thats a good one,,,


here is one more relating to GFR AND FF. If vascular resistance in the renal afferent arterioles decreases more than does resistance in
the efferent artiole, which one of the resulting changes is incorrect?
A.The filtration fraction is decreased.
B.Pressure favoring reabsorption in the peritubular capillary is reduced.
C.Both renal plasma flow and GFR are increased.
D.Hydrostatic pressure favoring glomerular filtration is reduced.
E.Extracellular fluid volume will contract.

[ArchivalUser]

hi team good to c u going

r u talking about dopamine or epi or nor epi zkadhem
as all hav dift effects on all vessels+ renal vasculature
and with recep on kideney u mean kidney or renal vessels??
thnx

its the dopamine that hav dose dependent effects on renal vessels as
they hav D1 receptors
so at low doses dopamine stimulate D1
moderate=D1+B1
high=D1+B1+alpha1

regarding norepi:
alpha effects r more marked than B
and for epi :
again dose dependent but B action are also there
in addition to B.
thnx

GL to all

[ArchivalUser]

scared to even attempt
e ?

[ArchivalUser]

genius123, i like the way u understand things and express ,, thats marvelous..

[ArchivalUser]

can u tell in clear about norepi and epi on kidney and arteriole if different and renin secretion regarding above effects,,,thanks in advance

[ArchivalUser]

hi pawan,, the answer for above q is D.Hydrostatic pressure favoring glomerular filtration is reduced.