Question

5. The kidney is an organ that contains blood capillaries that helps in the
filtration of blood. The useful substances get absorbed by the blood.
Which of the following describes the fate of harmful substance *
0 (a) Harmful substances dissolve in water and are removed from the body as urine.
O (b) Harmful substances get accumulated in the kidney and are released out as sweat.
O
(c) Harmful substances get absorbed by the blood and then are delivered to the lungs
for filtration.
O
(d) Harmful substances dissolve in water and then are delivered back to the kidney for
filtration​

Answer 1

Answer:

Harmful substances dissolve in water and are removed from the body as urine.

Answer 2

Explanation:

Podocytes are cells that line the glomerulus. They gave spaces between the cells. So they help in easy passage of specific substances and help infiltration of blood.

Henle's loop helps in the reabsorption of water and na+ only. But not major substances like glucose and most of the water and Na+ are absorbed in the proximal convoluted tubule.

Distal convoluted tubule helps in excretion of potassium from the body and it doesn't reabsorb back into the blood and helps in absorption of water and Na+ in presence of ADH and aldosterone hormones respectively.

An afferent arteriole is an arteriole that carries blood towards the glomerulus but not away from it. Efferent arterioles carry blood away from the glomerulus.

So the correct option is a.