Which of the following is the best explanation for why the cells of the proximal convoluted tubule (PCT)contain so many mitochondria?
A) Cells of the PCT go through a great deal of mitosis.
B) A great deal of active transport takes place in the PCT.
C) Contraction of the PCT moves filtrate through the tubule.
D) This provides the energy needed to fight kidney infection.

Question

Quizplus · Accepted Answer

The cells of the proximal convoluted tubule (PCT) contain many mitochondria because a great deal of active transport takes place in the PCT. The mitochondria provide the energy needed for active transport of substances such as glucose, amino acids, and ions out of the filtrate and into the blood.

Which of the Following Is the Best Explanation for Why