renal 4 - exctretion

Question 1

what is excretion?

Answer 1

everything that leaves the body. everyting that isnt reabsorbed

Question 2

Clearance

Answer 2

a way to measure GFR

clearance of a colute is the rate at chich a solute dissappears from the body by excretion or metabolism

Question 3

what is the perfect molecule to use in clearance?

Answer 3

Inulin (not insulin)
mostly expiermentally

its a polysaccharide found in a variety of plants was found isolated in nephrons to be completelty filtered and not reabsorbed

Question 4

what is the real perfect molecule to use in clearance?

Answer 4

creatine. to measure GFR

Question 5

why do we want to measure GFR

Answer 5

you can calculate clearance

you can understand if it there is net reabsorbtion or net secretion

Question 6

what is the micturition reflex?

Answer 6

a bladder-to-bladder contraction reflex

full pladder activates the mictrution reflex and stretch receptors

Question 7

what is the dtrusor muscle for?

Answer 7

to contract during urination to push the urine out of the bladder and into the urethra