Excretory Products and Their Elimination Chapter-Wise Test 11

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which statement about the renal pelvis is correct?

The renal pelvis is responsible for urine filtration.
The renal pelvis collects urine before passing it to the ureter.
The renal pelvis secretes aldosterone.
The renal pelvis reabsorbs glucose.
2

The renal pelvis collects urine from the collecting ducts before it moves into the ureter.

What is the primary function of the Henle’s loop in the nephron?

Ultrafiltration
Concentration of urine
Secretion of creatinine
Glucose absorption
2

The Henle’s loop helps concentrate urine by maintaining an osmotic gradient in the medulla.

Which waste product is primarily excreted by ammonotelic animals?

Urea
Ammonia
Uric acid
Creatinine
2

Ammonotelic animals, such as bony fishes and amphibians, excrete ammonia, which requires a large amount of water for elimination.

Which of the following is a function of the proximal convoluted tubule?

Filtration of blood
Selective secretion of hydrogen ions
Reabsorption of glucose and amino acids
Excretion of urea
3

The proximal convoluted tubule reabsorbs essential substances like glucose, amino acids, and sodium.

What is the main function of the proximal convoluted tubule (PCT)?

Filtration of blood
Reabsorption of essential nutrients
Secretion of bile
Production of ADH
2

The PCT is responsible for reabsorbing essential nutrients like glucose, amino acids, and ions back into the bloodstream.

Which structure regulates blood pressure by releasing renin in response to low blood flow?

Bowman’s capsule
Loop of Henle
Juxtaglomerular apparatus
Collecting duct
3

The juxtaglomerular apparatus (JGA) releases renin to regulate blood pressure by activating the renin-angiotensin system.

Which excretory structure is found in earthworms?

Malpighian tubules
Flame cells
Nephridia
Green glands
3

Earthworms possess nephridia, which help in excretion and osmoregulation.

Which segment of the nephron plays a significant role in the counter-current mechanism?

Bowman’s capsule
Proximal convoluted tubule
Loop of Henle
Distal convoluted tubule
3

The Loop of Henle plays a major role in the counter-current mechanism by maintaining an osmolarity gradient for water conservation.

Which of the following statements about the juxtaglomerular apparatus (JGA) is correct?

JGA releases renin to regulate blood pressure.
JGA is located in the loop of Henle.
JGA is responsible for urine formation.
JGA increases urine output by inhibiting ADH.
1

The juxtaglomerular apparatus releases renin to regulate blood pressure and glomerular filtration rate.

Which structure in the nephron is responsible for filtering blood plasma?

Loop of Henle
Bowman’s capsule
Collecting duct
Distal convoluted tubule
2

Bowman’s capsule, along with the glomerulus, filters blood plasma to form the initial filtrate.

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