Tubular reabsorption occurs from the;
a. renal tubules into the capillaries
b. capillaries into the renal tubules
c. collecting duct into the glomerulus
d. glomerulus into the collecting duct

If a patient has not eaten for 48 hours, it would be normal for the urine to contain;
a. glucose
b. ketones
c. white blood cells
d. amino acids

The concentration of water in urine is regulated by
a. thyroid hormone
b. antithyroid hormone
c. diuretic hormone
d. antidiuretic hormone