Question

Glomerular Filtration Rate:

A. - It is the pressure exerted by the proteins in the blood.
B. - It is the volume of filtrate formed each minute by the combined activity of all 2 million glomeruli of the kidneys
C.-This pressure can be controlled by changing the diameter of the afferent arterioles
D. It ils mainly determined by the hydrostatic pressure in the glomerulus
E. - The ability of a filtration membrane to allow another substance to pass through it membrane.

Answer 1

B.- It is the volume of filtrate formed each minute by the combined activity of all 2 million glomeruli of the kidneys

Step-by-step explanation:

The Glomerular Filtration Rate is used in a clinical context to determine the renal function at the glomeruli. Therefore, it measures the volume of filtrate formed by all the glomeruli.

It depends of the following factors,

- The hydrostatic pressure in the glomeruli capilar

- The hydrostatic pressure in the glomeruli Bowman capsule (renal unit of the where the filtration is done)

- Oncotic pressure in the glomeruli capilar (pressure exerted by the proteins in the blood)

Moreover, there are a few other factors that influence this rate. For example, any changes in the diameter of the afferent arterioles will have a direct impact in the Glomerular Filtration Rate. If the diameter enlarges, the resistance in the arterioles diminished, and therefore the Glomerular Filtration Rate increases. A second example is the ability of the membrane to allow substances to pass through is also crucial. If the membrane was not allowing an easy exchange, the rate would decrease.