General Science & Healthcare•Updated for 2026 Competitive Exams
35 Important MCQS on Excretory System
Practice top multiple choice questions (MCQs), topic summary, and verified answers for 35 Important MCQS on Excretory System. Essential for Central & State competitive examinations. Solve these high-frequency practice questions with step-by-step solutions to evaluate your preparation level.
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Practice Questions & Explanations (35 Questions)
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Q1SSC CGL / RRB NTPCEasy
What is the primary excretory organ in the human body?
Q2SSC CHSL / State PSCEasy
Which of the following is the basic structural and functional unit of the kidney?
Q3UPSC / CDSMedium
What is the primary nitrogenous waste product excreted by humans?
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Q4SSC CGL / NEETMedium
In which organ is ammonia converted into urea in the human body?
Q5RRB Group DMedium
The cup-shaped structure in the nephron that encloses the glomerulus is called:
Q6SSC MTS / NDAMedium
What is the network of capillaries enclosed by the Bowman's capsule called?
Q7IBPS / State ExamsEasy
Which structure carries urine from the kidneys to the urinary bladder?
Q8UPSC / State PSCHard
What is the function of the Loop of Henle in the kidney?
Q9SSC CGL / RailwayMedium
Which of the following organisms excrete uric acid as their primary nitrogenous waste?
Q10Nursing / State PSCMedium
What is the medical term for the presence of blood in the urine?
Q11SSC CHSL / PoliceEasy
The artificial process of removing waste products and excess fluid from the body when kidneys fail is called:
Q12SSC CGL / CDSMedium
Kidney stones are most commonly composed of which chemical compound?
Q13UPSC Prelims / NDAHard
Which hormone regulates the reabsorption of water in the distal convoluted tubule and collecting duct?
Q14SSC MTS / RRB Group DEasy
Sweat primarily functions to regulate body temperature, but it also helps in the excretion of small amounts of:
Q15State PSC / SSC CGLMedium
The yellow colour of normal urine is due to the presence of a pigment called:
Q16Nursing / State ExamsMedium
What is the term used for the condition characterized by excess urea in the blood due to kidney failure?
Q17RRB NTPC / SSC CGLEasy
Which of the following blood vessels carries oxygenated, waste-rich blood TO the kidneys?
Q18State PSCEasy
The average daily urine output of a healthy human adult is approximately:
Q19UPSC / CDSHard
Flame cells are the excretory structures found in which of the following organisms?
Q20SSC CGL / RailwayMedium
Malpighian tubules are the main excretory organs of:
Q21NEET / UPSCHard
The structural component of the kidney where the Bowman's capsule and Glomerulus are jointly located is called the:
Q22SSC CHSL / State ExamsMedium
What is the normal pH range of human urine?
Q23UPSC / State PSCMedium
Earthworms primarily excrete their nitrogenous wastes through tubular structures known as:
Q24SSC CGL / RailwayEasy
The presence of excessive glucose in the urine, often indicative of Diabetes Mellitus, is termed:
Q25NDA / UPPSCHard
Which part of the brain is primarily responsible for triggering the sensation of a full bladder (micturition reflex)?
Q26SSC CHSL / State ExamsMedium
Bony fishes are primarily:
Q27RRB Group DEasy
The inner region of the human kidney is known as the:
Q28UPSC / NEETHard
Which of the following is NOT reabsorbed in the Proximal Convoluted Tubule (PCT)?
Q29SSC CGL / State PSCMedium
The hormone Aldosterone primarily promotes the reabsorption of which ion in the kidneys?
Q30CDS / SSC CHSLMedium
Which artery brings oxygenated blood to the nephron specifically?
Q31IBPS / RailwayMedium
What is the name of the funnel-like dilated part of the ureter inside the kidney?
Q32SSC MTS / Police ExamsEasy
The process of urination is scientifically known as:
Q33RRB NTPC / SSC CGLEasy
In humans, the right kidney is slightly lower than the left kidney because of the presence of the:
Q34UPSC / State PSCHard
Green glands (antennal glands) are excretory organs found in:
Q35SSC CGL / RailwayMedium
Which of these substances is fully reabsorbed in a healthy kidney and should NOT appear in urine?
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