The Kidney 2

Question 1

what is kidney reabsorption?

Answer 1

Reabsorption returns filtered substances from the tubular fluid back into the circulation.

Question 2

what is kidney secretion?

Answer 2

Secretion is the transfer of substances from the blood via tubular cells into the tubular fluid of the nephron.

Question 3

describe the mechanism for reabsorption of glucose in the nephron

Answer 3

all filtered glucose is reabsorbed in the proximal convoluted tubule: lumen of tubule -> kidney cell -> into capillary

Question 4

where is water absorbed in the nephron?

Answer 4

the loop on Henle

Question 5

what is the role of ADH in renal function?

Answer 5

ADH tells kidney to reabsorb the water via the transportation of aquaporins, controlling the amount of urine formation

Question 6

what is the role of aldosterone in renal function?

Answer 6

aldosterone binds to a receptor found in the cytoplasm of the tubular cells of the kidney and causes kidney to excrete potassium in urine

Question 7

define excretion

Answer 7

the process of eliminating waste matter
amount of substance excreted = tubular load + amount secreted - amount reabsorbed