The filtration of plasma per unit of time is known as the glomerular filtration rate (GFR).The GFR is directly related to:
A) perfusion pressure in the glomerular capillaries.
B) diffusion rate in the renal cortex.
C) diffusion rate in the renal medulla.
D) glomerular active transport.

Question

Quizplus · Accepted Answer

The perfusion pressure in the glomerular capillaries is directly related to the glomerular filtration rate (GFR) because it determines the pressure gradient across the filtration membrane. A higher perfusion pressure increases the GFR and a lower perfusion pressure decreases the GFR. Diffusion rate in the renal cortex and medulla and glomerular active transport may affect the tubular reabsorption and secretion, but they are not directly related to the GFR.

The Filtration of Plasma Per Unit of Time Is Known