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Excretory Products and their Elimination Practice Questions

Class 11 · Biology · 2221 free MCQs with instant results and detailed explanations.

2221
Total
681
Easy
1084
Medium
456
Hard

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Topics in Excretory Products and their Elimination

Osmoregulation 563
Kidneys 549
Dialysis 569
Urine Formation 540

Sample Questions from Excretory Products and their Elimination

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
Which part of the nephron is responsible for the reabsorption of most water and solutes?
A. Proximal convoluted tubule
B. Distal convoluted tubule
C. Loop of Henle
D. Collecting duct
Show Answer & Explanation
Correct Answer: A
The proximal convoluted tubule is the part of the nephron where about 65-70% of water and solutes like glucose are reabsorbed back into the bloodstream.
Q2
Easy
What is the primary waste product excreted by the kidneys?
A. Urea
B. Creatinine
C. Uric acid
D. Ammonia
Show Answer & Explanation
Correct Answer: A
Urea is the main nitrogenous waste product formed from the breakdown of proteins in the liver and is primarily excreted by the kidneys.
Q3
Easy
In which part of the kidney does filtration of blood primarily occur?
A. Renal pelvis
B. Glomerulus
C. Renal cortex
D. Medulla
Show Answer & Explanation
Correct Answer: B
Filtration of blood primarily occurs in the glomerulus, where blood pressure forces water and solutes through the capillary walls into the Bowman's capsule.
Q4
Medium
What is the primary functional unit of the kidney responsible for urine formation?
A. Nephron
B. Glomerulus
C. Ureter
D. Loop of Henle
Show Answer & Explanation
Correct Answer: A
Nephrons are the basic structural and functional units of the kidney that filter blood and form urine.
Q5
Medium
Which of the following substances is primarily reabsorbed in the proximal convoluted tubule?
A. Water
B. Glucose
C. Urea
D. Creatinine
Show Answer & Explanation
Correct Answer: B
The proximal convoluted tubule reabsorbs a significant amount of glucose, along with amino acids and water.
Q6
Medium
During filtration in the kidney, which substance is NOT typically filtered out of the blood?
A. Water
B. Glucose
C. Blood cells
D. Urea
Show Answer & Explanation
Correct Answer: C
Blood cells are too large to pass through the glomerular filtration membrane, so they remain in the blood.
Q7
Medium
What hormone primarily regulates water reabsorption in the kidneys?
A. Aldosterone
B. Antidiuretic Hormone
C. Insulin
D. Cortisol
Show Answer & Explanation
Correct Answer: B
Antidiuretic Hormone (ADH) increases the permeability of collecting ducts, promoting water reabsorption.
Q8
Hard
Which of the following structures is primarily responsible for the filtration of blood in the kidneys?
A. Glomerulus
B. Proximal Convoluted Tubule
C. Loop of Henle
D. Collecting Duct
Show Answer & Explanation
Correct Answer: A
The glomerulus is a network of capillaries where blood filtration takes place, initiating urine formation.
Q9
Hard
Which hormone is responsible for the regulation of sodium reabsorption in the kidneys?
A. Aldosterone
B. Antidiuretic Hormone
C. Renin
D. Natriuretic Peptide
Show Answer & Explanation
Correct Answer: A
Aldosterone increases the reabsorption of sodium ions in the kidneys, affecting water retention and blood pressure.
Q10
Hard
In which part of the nephron does the majority of glucose reabsorption occur?
A. Proximal Convoluted Tubule
B. Loop of Henle
C. Distal Convoluted Tubule
D. Collecting Duct
Show Answer & Explanation
Correct Answer: A
The proximal convoluted tubule is responsible for reabsorbing approximately 100% of glucose from the filtrate.

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Excretory Products and their Elimination — Class 11 Biology Practice Questions Online

This page contains 2221 practice MCQs for the chapter Excretory Products and their Elimination in Class 11 Biology. The questions are organized by difficulty — 681 easy, 1084 medium, 456 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.