A Primary Reason That the Kidneys Have One of the Highest

Multiple Choice

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.
E) they have an abundance of myogenic smooth muscle.