Question

The fact that large numbers of mitochondria are observed in the tubule cells of nephrons suggests that the nephron is involved in the process of
A) active transport
B) passive transport
C) osmosis
D) diffusion

Answer 1

A) Active transport

Explanation:

The nephron consists of the Bowman's capsule, Proximal convuleted tubule, Loop of Henle, and Distal convoluted tubule.

In the tubules of the nephron, extra glucose and salts are reabsorbed from the liquid (ultrafiltrate). As they are present in high concentration in the blood flowing through the veins, compared to the liquid, active transport takes place to send back all the extra glucose to the blood.

And active transport requires energy to occur as substances are transported from low concentration to high concentration.

And for energy, mitochondrions are required

Therefore, the fact that large numbers of mitochondria are observed in the tubule cells of nephrons is because for active transport to take place.