Question

Assertion- nephron is the excretory unit of kidney and reason- it has no role in secretion of urine

Answer 1

Both assertion and reason are correct but the reason doesn’t explain assertion.

Answer 2

The assertion is correct but the reason is incorrect.

• The uriniferous tubule, usually called the nephron, is the kidney's excretory unit.
• Excretion is the process of an organism's hazardous waste being removed from its body.
• The Nephron is indeed the primary component of homeostasis, as it is essential for the formation of urine.
• Nephron's main functions involve blood filtration, secretion and, reabsorption.
• So every individual kidney has about 1 million nephrons. Adult kidneys, or metanephros, of terrestrial vertebrates such as birds, reptiles, as well as, mammals have the most mature nephrons.
• In the mammalian kidney, each nephron is a long tubule, or exceedingly tiny tube, measuring 30–55 mm (1.2–2.2 inches) in length.
• The tube is enclosed over one end, extended, and wrapped into the double cuplike shape on the other.