Assertion : The glomerular filtrate resembles the protein free plasma in composition and osmotic pressure .
Reason : The glomerular capillary wall and inner membrane of Bowman's capsule are impermeable to large molecules .

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and the reason are true and the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

A

Explanation

(a) Glomerular filtrate is the protein free fluid which is filtered from the blood of glomerular capillaries to the lumen of the Bowman's capsule . This process id called glomerular filtration. About one-fifth of the total volume of plasma flowing through the kidneys is filtered occurs across the membrane made of the glomerular capsule . The pores of this following membrance are impermeable to large molecules or particules. Large paticles like blood cells and protein macromolecules do not normally enter into the glomerular filtrate. But smaller molecules like glucose , urea , creatinine ,amino acids and mineral salts are filtered into the Bowman's to their respective concentrations in the plasma. The filtrate therefore almost resembles the protein free plasma in composition and osmotic pressure.