NSEB Excretory Product & Their Elimination Questions and Answers

The topic Excretory Products and Their Elimination is an important part of biology for NSEB preparation. It focuses on how organisms remove metabolic waste products such as ammonia, urea, and uric acid from their bodies.

Practicing NSEB Excretory Product & Their Elimination Questions helps students strengthen conceptual understanding and improve problem-solving skills. Questions are often asked on types of nitrogenous wastes, organs involved in excretion, and mechanisms like ultrafiltration and selective reabsorption.

Also Read: 

• NSEB syllabus
• NSEB Previous Year Question Papers

Important Topics Covered in Excretory Product & Their Elimination

Before attempting questions, students should be familiar with the following concepts:

• Types of nitrogenous wastes: Ammonia, Urea, Uric Acid

• Human excretory system (kidneys, nephron structure)

• Mechanism of urine formation

• Osmoregulation and homeostasis

• Excretion in different organisms (fish, birds, mammals)

NSEB Excretory Product & Their Elimination Questions with Answers

This section includes a variety of NSEB Excretory Product & Their Elimination Questions designed to cover both basic and advanced concepts. Students can practice these questions to improve their understanding of key biological processes and prepare effectively for the exam.

1. Part of kidney through which the ureter, blood vessels and nerves enters into it __________

(A) Renal cortex
(B) Renal medulla
(C) Hilum
(D) Urethra 

Solution: 1. (C)

2. Malpighian body is constituted by
(A) Glomerulus, Bowman's capsule and efferent vessel
(B) Glomerulus and efferent vessel
(C) Glomerulus and Bowman's capsule
(D) Only Glomerulus 

Solution: 2. (C) 

3. Least toxic nitrogenous waste is
(A) Urea
(B) Uric acid
(C) Ammonia
(D) All of the above 

Solution: 3. (B)

4. The parts of nephron situated in cortical region of kidney are
(A) Loop of Henle, PCT and Collecting duct
(B) Collecting duct, PCT and Malpighian corpuscle
(C) PCT, DCT and Loop of Henle
(D) PCT, DCT and Malpighian corpuscle 

Solution: 4. (D) 

5. Figure shows human urinary system with structures A-D. Select option which correctly identifies them and gives their characteristics and/of functions

(A) A-Adrenal gland-located at the anterior part of kidney. Secrete catecholamines, which stimulate glycogen breakdown
(B) B-Pelvis-broad funnel shaped space inner to Medulla, directly connected to loops of Henle
(C) C-Medulla-inner zone of kidney and contains complete nephrons
(D) D-Cortex-outer part of kidney and do not contain any part of nephrons

Solution: 5. (A)

6. Which one of the following statement is incorrect?
(A) The medullary zone of kidney is divided into a few conical masses called medullary pyramids projecting into calyces
(B) Inside the kidney the cortical region extends in between the medullary pyramids as renal pelvis
(C) Glomerulus along with Bowman's capsule is called the renal corpuscle
(D) Renal corpuscle, proximal convoluted tubule (PCT) and distal convoluted tubule (DCT) of the nephron are situated in the cortical region of kidney 

Solution: 6. (B) 

7. Kidneys are reddish brown, bean-shaped structures situated between the levels of ________ thoracic and _____ lumbar vertebrae
(A) 11th ; 1st
(B) 12th ; 3rd
(C) 10th ; 2nd
(D) 12th ; 5th 

Solution: 7. (B)

8. Conditional reabsorption of ___(A)___ and ___(B)___ takes place in ___(C)___
(A) A- Na+ B – H2O C – DCT
(B) A- K+ B – H2O2 C–Loop of Henle
(C) A- K+ B – H2O C – PCT
(D) A- NH3 B – Na C – PCT 

Solution: 8. (A)

9. An organism which do not have loop of Henle will excrete
(A) No urine
(B) Dilute urine
(C) Concentrated urine
(D) No change in urine 

Solution: 9. (B)

10. A fall in glomerular filtration rate (GFR) activates

(A) Posterior pituitary to release vasopressin
(B) Juxta glomerular cells to release renin
(C) Adrenal cortex to release aldosterone
(D) Adrenal medulla to release adrenaline

Solution: 10. (B)

11. The maximum amount of electrolytes and water (70-80%) from the glomerular filtrate is reabsorbed in__________ part of the nephron
(A) Ascending limb of loop of Henle
(B) Distal convoluted tubule
(C) Proximal convoluted tubule
(D) Descending limb of loop of Henle 

Solution: 11. (C)

12. Podocytes are
(A) Endothelial cells of the glomerulus
(B) Endothelial cells of the Bowman’s capsule
(C) Epithelial cells of the Bowman’s capsule
(D) Epithelial cells of the glomerulus 

Solution: 12. (C)

13. Statement-I: Epithelial cells of Bowman’s capsule are arranged so intricately so as to leave some minute space called filtration slits or slit pores.
Statement-II: Blood is filtered so finely through these slits that almost all component of blood except the protein pass out the lumen of the Bowman’s capsule 

(A) Both statement I and II are correct
(B) Statement I is correct but statement II is incorrect
(C) Statement I is incorrect but statement II is correct
(D) Both statement I and II are incorrect. 

Solution: 13. (B)

14. Statement-I: Tubular cells secrete substances like H+ , K+ and NH3 into the filtrate.

Statement-II: They helps in maintaining the ionic and acid base balance. 

(A) Both statement I and II are correct
(B) Statement I is correct but statement II is incorrect
(C) Statement I is incorrect but statement II is correct
(D) Both statement I and II are incorrect. 

Solution: 14. A

15. Statement-I: Endothelium of capillaries of glomerulus and wall of Bowman’s capsule plus basement membrane form the filtration membrane.
Statement-II: A wider efferent Arteriole in comparison to afferent one is reason why pressure for filtration generator. 

(A) Both statement I and II are correct
(B) Statement I is correct but statement II is incorrect
(C) Statement I is incorrect but statement II is correct
(D) Both statement I and II are incorrect

Solution: 15. (B)

NSEB Excretory Product & Their Elimination Questions PDF

Students can download the NSEB Excretory Product & Their Elimination Questions PDF for offline practice and revision. This PDF includes a compiled set of important questions along with answers, making it easier for students to revise anytime. The PDF format is especially helpful for quick revision before exams and allows students to practice questions in a structured manner. 

NSEB Excretory Product & Their Elimination Questions PDF

Preparation Tips for NSEB Excretory System Topic

To score well in NSEB, students should:

• Focus on NCERT concepts thoroughly

• Practice diagrams of nephron and kidney

• Revise differences between ammonotelic, ureotelic, and uricotelic organisms

• Solve previous year NSEB questions regularly

• Understand processes like ultrafiltration, reabsorption, and secretion