Processing of filtrate in the proximal and distal tubules ________.
A) achieves the conversion of toxic ammonia to less toxic urea
B) maintains homeostasis of pH in body fluids
C) regulates the speed of blood flow through the nephrons
D) reabsorbs urea to maintain osmotic balance

Question

Quizplus · Accepted Answer

The proximal and distal tubules play a crucial role in maintaining the homeostasis of pH in body fluids. They secrete and reabsorb hydrogen and bicarbonate ions to regulate the acidity of the blood and prevent acidosis or alkalosis. The conversion of toxic ammonia to less toxic urea occurs in the liver and is not directly related to the processing of filtrate in the tubules. The speed of blood flow through the nephrons is regulated by the afferent and efferent arterioles, not the tubules. While urea is excreted in urine, it is not actively reabsorbed in the tubules.

Processing of Filtrate in the Proximal and Distal Tubules ________