A primary reason that the kidneys have one of the highest metabolic rates of all body organs is that
A)they store the body's excess fats.
B)they have membranes of varying permeability to water.
C)they operate an extensive set of active-transport ion pumps.
D)they are the body's only means of shedding excess nutrients.

Question

Quizplus · Accepted Answer

The kidneys have one of the highest metabolic rates of all body organs because they operate an extensive set of active-transport ion pumps, which require energy in the form of ATP. These pumps are responsible for filtering and reabsorbing ions, nutrients, and other molecules from the blood, while also secreting waste products and excess substances into the urine. This complex process requires a lot of energy, which is why the kidneys have a high metabolic rate.

A Primary Reason That the Kidneys Have One of the Highest