The presence of epithelial tissues in the renal tubules facilitates its function of:
a. stratified; tubular reabsorption
b. stratified; tubular secretion
c. simple; excretion
d. simple; tubular reabsorption
a. stratified; tubular reabsorption
b. stratified; tubular secretion
c. simple; excretion
d. simple; tubular reabsorption