Excretory Products and Their Elimination Chapter-Wise Test 23

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following excretory products is a result of nucleic acid metabolism?

Urea
Creatinine
Uric acid
Ammonia
3

Uric acid is a nitrogenous waste product formed from the metabolism of nucleic acids.

Which of the following statements about nephron function is correct?

The glomerular filtrate contains blood cells and proteins.
The Loop of Henle is responsible for the ultrafiltration process.
The distal convoluted tubule actively secretes potassium and hydrogen ions.
The collecting duct is involved in glucose reabsorption.
3

The distal convoluted tubule plays a role in acid-base balance by actively secreting potassium and hydrogen ions.

Which of the following statements about urine composition is correct?

Urine contains urea, creatinine, and uric acid.
Urine normally has a high concentration of proteins.
Glucose is always present in normal urine.
Red blood cells are normally found in urine.
1

Urine primarily contains nitrogenous wastes such as urea, creatinine, and uric acid.

Which nitrogenous waste is primarily excreted by reptiles and birds?

Ammonia
Urea
Uric acid
Creatinine
3

Reptiles and birds excrete uric acid as a semisolid paste to conserve water.

What is the normal glomerular filtration rate (GFR) in a healthy human?

50 mL/min
100 mL/min
125 mL/min
200 mL/min
3

The normal GFR in a healthy individual is approximately 125 mL/min, which equals about 180 liters per day.

Which organ plays a significant role in excreting carbon dioxide?

Liver
Kidney
Lungs
Skin
3

The lungs excrete carbon dioxide, a waste product of cellular respiration, through exhalation.

What is the role of atrial natriuretic factor (ANF) in kidney function?

Increases sodium retention
Reduces blood pressure
Stimulates renin secretion
Increases water reabsorption
2

ANF reduces blood pressure by promoting sodium excretion and inhibiting the renin-angiotensin system.

Which of the following excretory structures is found in crustaceans like prawns?

Malpighian tubules
Green glands
Flame cells
Nephridia
2

Green glands (also called antennal glands) perform excretory functions in crustaceans like prawns.

Which of the following structures carries urine from the kidneys to the bladder?

Urethra
Ureter
Collecting duct
Renal pelvis
2

The ureter carries urine from the renal pelvis of the kidney to the urinary bladder.

Which organ in humans plays a primary role in excretion?

Liver
Lungs
Kidneys
Skin
3

Kidneys are the primary excretory organs that remove nitrogenous wastes and help in osmoregulation.

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