AIIMS Zoology Excretory Products And Their Elimination Class 11 Questions

Assertion: Malpighian tubules are excretory organs in most of the insects

Assertion: In proximal convoluted tubule glomerular filtrate becomes hypertonic to blood plasma. Reason: HCO₃⁻ is absorbed only in the proximal convoluted tubule.

Which one of the following is correct regarding the excretion ?

Assertion: While on going down the loop of Henle, the filtrate becomes hypotonic. Reason: The descending limb of loop of Henle is impermeable to both water and electrolytes.

Assertion (A) : Secreting hypotonic urine is effective in reducing urinary loss of water. Reason (R) : Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

Assertion: Inflammation of a skeletal joint may immobilize the movements of the joint. Reason: Uric acid crystals in the joint cavity and ossification of articular cartilage lead to this.

Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?

Which one of the following groups of structures/organs have similar function?

Which of the following are uricotelic animals?

Urea is transported by