Question

Active processes in tubular secretion include all of the following, except?

1) removes water from the glomeruli back into circulation
2) removes drugs from body in urine through secretion
3) removes undesirable wastes such as urea and creatinine
4) removes excess hydrogen and potassium ions
5) maintains acid-base balance of blood, thus preventing metabolic acidosis or alkalosis

Answer 1

Tubular secretion in the kidneys involves the active transport of substances like drugs, urea, and excess ions from the blood to be excreted in the urine. The process helps eliminate wastes and maintain acid-base balance. However, it does not remove water from the glomeruli back into circulation.

Step-by-step explanation:

Tubular secretion is a process in the kidneys where certain substances, such as drugs, metabolic wastes, urea, and excess hydrogen and potassium ions are actively transported from the blood into the tubules of the nephron for excretion in the urine. This helps to eliminate undesirable wastes and maintain the acid-base balance of the blood. However, it does not remove water from the glomeruli back into circulation. That process is known as tubular reabsorption. Therefore, the correct answer is option 1) removes water from the glomeruli back into circulation.