309
MCQ Questions
40
Assertion-Reason
91
NEET 2025 Pattern
22
Previous Year Q
NCERT Mapping
Excretory products and their elimination is from NCERT Class 11 Biology, Chapter 16, under the unit Human Physiology. This chapter carries approximately 3% weightage in NEET, based on analysis of the last 10 years of question papers. MedicNEET covers this chapter with 440 questions — every question built from line-by-line NCERT analysis.
Topics in Excretory products and their elimination
Human excretory system
Function of the tubules
Mechanism of concentration of the filtrate
Regulation of kidney function
Micturition
Role of other organs in excretion
Disorders of the excretory system
Urine formation
Sample Questions — Excretory products and their elimination
Try 5 free questions below. Get all 440 in the MedicNEET app.
MCQ
Where is urine stored before it is released from the body?
✅ Correct Answer: C
Urine formed in nephrons is carried to the urinary bladder for storage.
MCQ
The reflex that helps release urine is called:
✅ Correct Answer: A
This is the name of the spinal reflex arc involved in urine release.
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MCQ
6. A patient has low ADH, high thirst, and produces large volumes of urine. Which part is likely involved?
✅ Correct Answer: C
Collecting duct responds to ADH for water reabsorption.
Assertion-Reason
Assertion (A): Ammonia excretion is suitable for aquatic animals but not terrestrial ones.
Reason (R): Ammonia excretion depends on large amounts of water being available for its elimination due to its high toxicity.
✅ Correct Answer: A
NCERT states “Ammonia is the most toxic form and requires large amount of water for its elimination” and describes how aquatic animals can excrete ammonia while terrestrial animals use urea/uric acid. The Assertion is true - ammonia excretion suits aquatic but not terrestrial animals. The Reason explains WHY - the dependency on large water amounts makes it suitable only where water is abundant.
NEET 2025 Pattern
Which of the following statements about disorders of the excretory system are NOT correct?
S1: Renal calculi are formed by the crystallisation of calcium carbonate in the Bowman's capsule.
S2: Glomerulonephritis is characterized by the inflammation of the glomeruli of the kidney.
S3: Uremia is the accumulation of excess urea in the blood, leading to kidney failure.
S4: Renal calculi can sometimes obstruct the flow of urine, causing severe pain and potential kidney damage.
S5: The primary cause of glomerulonephritis is usually a bacterial infection of the bladder that spreads to the kidneys.
✅ Correct Answer: A
The core concept is the definition and characteristics of excretory system disorders.
S1: "Renal calculi: Stone or insoluble mass of crystallised salts (oxalates, etc.) formed within the kidney." This statement is NOT correct because renal calculi are typically formed from oxalates (or other salts, not specifically calcium carbonate as the primary constituent, though calcium salts are common) and form *within the kidney* itself, not specifically the Bowman's capsule.
S2: "Glomerulonephritis: Inflammation of glomeruli of kidney." This statement is correct, so it is not a 'NOT correct' statement.
S3: "Malfunctioning of kidneys can lead to accumulation of urea in blood, a condition called uremia, which is highly harmful and may lead to kidney failure." This statement is correct, so it is not a 'NOT correct' statement.
S4: While not explicitly stated in NCERT that renal calculi *can* obstruct urine flow, the description of them as 'stone' or 'insoluble mass' formed 'within the kidney' logically implies potential obstruction. This is a common and biologically accurate consequence. This statement is correct in its implications and consistent with the general understanding of kidney stones, so it is not a 'NOT correct' statement.
S5: "Glomerulonephritis: Inflammation of glomeruli of kidney." NCERT states it's inflammation of glomeruli but does not specify bacterial infection of the bladder as its primary cause. The cause can be varied, including autoimmune factors. Therefore, attributing it primarily to a bladder bacterial infection is NOT correct as per NCERT context provided.
Statements S1 and S5 are NOT correct.
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Frequently Asked Questions
How many Excretory products and their elimination questions does MedicNEET have?
MedicNEET has 440 questions for Excretory products and their elimination, including 309 MCQs, 40 Assertion-Reason questions, and 91 NEET 2025-style long-form questions.
What is the NEET weightage of Excretory products and their elimination?
Excretory products and their elimination carries approximately 3% weightage in NEET, based on analysis of the last 10 years of papers. It falls under the Human Physiology unit of Class 11 Biology.
Are Excretory products and their elimination questions NCERT-based?
Yes, all MedicNEET Excretory products and their elimination questions are built from line-by-line analysis of NCERT Class 11 textbook. Every question maps to specific NCERT pages and concepts.