Question

6. Which one of following. correctly explains the function of a specific part of a human nephron?
A Afferent arteriole : Carries the blood away from the glomerulus towards renal vein
B Podocytes : Create minute spaces (slit pores) for the filtration of blood into the Bowman's capsule
C Henle's loop : Most reabsorption of the major substances from the glomerular filtrate
D Distal convoluted tubule: Reabsorption of K+ ions into the surrounding blood capillaries.​

Answer 1

Answer:

The first step in urine formation is the filtration of blood, which is carried out by the glomerulus and is called glomerular filtration. On an average, 1100-1200 ml of blood is filtered by the kidneys per minute which constitute roughly 1/5th of the blood pumped out by each ventricle of the heart in a minute. The glomerular capillary blood pressure causes filtration of blood through 3 layers, i.e., the endothelium of glomerular blood vessels, the epithelium of Bowman's capsule and a basement membrane between these two layers. The epithelial cells of Bowman's capsule, called podocytes are arranged in an intricate manner so as to leave some minute spaces called filtration slits or slit pores. Blood is filtered so finely through these membranes, that almost all the constituents of the plasma except the proteins pass onto the lumen of the Bowman's capsule. Therefore, it is considered as a process of ultrafiltration.

So, the correct answer is option B