Which of the following is the primary function of the juxtaglomerular complex?

reabsorption of Na⁺ and other ions

concentrating urine

a system that protects the nephron from some chemicals found in blood

releases chemical signals that regulate the rate of filtrate formation

Solutions

Expert Solution

Option 3 (Releases chemical signals that regulate the rate of filtrate formation) is correct

Justification: Juxtaglomerular complex is a structure in kidney which regulates the function of each nephron. This structure is formed by the distal convoluted tubule and glomerular afferent arteriole. It's main function is to regulate blood pressure and filtration rate of glomerulus. So, for this function, macula densa and granular cells of the juxtaglomerular complex release chemicals for the to regulate the rate of formation of the filtrate.

Justification for incorrect options:

Option 1 is incorrect because there will be decrease in sodium levels but the juxtaglomerular complex will not reabsorb the sodium ions and when there is a drop in sodium concentration, juxtaglomerular cells are stimulated to release renin. So, this option is incorrect.
Option 2 is incorrect because juxtaglomerular system is a system that protects nephron from some chemicals is found in kidney but not in the blood. So, this option is also incorrect.

Hence, option 3 is the correct answer.

Sydney Mullin answered 1 year ago

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