Question

Glomerular filtration is possible because-

• A. Afferent glomerular capillary is wider than efferent glomerular capillary
• B. Afferent glomerular capillary is narrower than efferent glomerular capillary
• C. Afferent glomerular arteriole is wider than efferent glomerular arteriole
• D. Afferent glomerular arteriole is narrower than efferent glomerular arteriole

Answer 1

The correct option is C

Afferent glomerular arteriole is wider than efferent glomerular arteriole

The diameter of the afferent (incoming) arteriole is greater than the diameter of the efferent arteriole (by which blood leaves the glomerulus). As a result, there is no drop in blood pressure that would usually occur when blood flows from the arterial end to the venous end in capillaries. The maintenance of high pressure drives glomerular filtration.