This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 19 Excretory Products And Their Elimination – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 19 Excretory Products And Their Elimination Quiz 4 (50 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What organ in the excretory system gets rid of carbon dioxide and water vapor? A) Kidneys. B) Lungs. C) Skin. D) None of the above. Show Answer Correct Answer: B) Lungs. 2. What will happen to glomerular filtration rate (GFR) if efferent arteriole smooth muscle is contracted? A) GFR will decrease. B) GFR can either increase or decrease. C) GFR will remain constant. D) GFR will increase. Show Answer Correct Answer: D) GFR will increase. 3. Vasa recta in cortical nephrons: A) 1. Arises from afferent arteriole rather that efferent arteriole. B) 3. Carries deoxygenated blood rich in urea. C) 4. Is absent or highly reduced. D) 2. Does not get involved in counter current exchange with loop of henle. Show Answer Correct Answer: C) 4. Is absent or highly reduced. 4. Renal corpuscle or Malpighian body is- A) Bowman's capsule. B) Glomerulus only. C) Glomerulus with afferent arteriole. D) Glomerulus along with Bowman's capsule. Show Answer Correct Answer: D) Glomerulus along with Bowman's capsule. 5. Osmoreceptors in the body are activated by changes in- A) Blood volume but not body fluid volume. B) Body fluid volume but not blood volume. C) Blood volume and body fluid volume. D) Blood volume, body fluid volume and ionic concentration. Show Answer Correct Answer: D) Blood volume, body fluid volume and ionic concentration. 6. For conservation of water terrestrial adaptation necessitated production of less toxic Nitrogenous wastes like A) Urea and Uric acid. B) Ammonia. C) Ammonia, urea and Uric acid. D) None of the above. Show Answer Correct Answer: A) Urea and Uric acid. 7. Statement I-Mammals have the ability to produce a concentrated urine.Statement II-The flow in both the limbs of Vasa recta and Henley's loop are in opposite direction. A) Both the statement are correct. B) Both the statement are incorrect. C) Only Statement I is correct. D) Only Statement II is correct. Show Answer Correct Answer: A) Both the statement are correct. 8. Which part of nephron helps in maintaining pH and ionic balance? A) PCT and Henley's loop. B) Collecting duct and Henley's loop. C) PCT and DCT. D) DCT and Henley's loop. Show Answer Correct Answer: C) PCT and DCT. 9. Which hormone facilitates water reabsorption in the kidneys? A) Angiotensin II. B) Antidiuretic Hormone (ADH). C) Aldosterone. D) Renin. Show Answer Correct Answer: B) Antidiuretic Hormone (ADH). 10. What is the term for the inflammation of the glomeruli in the kidneys? A) Glomerulonephritis. B) Nephritis. C) Cystitis. D) Uremia. Show Answer Correct Answer: A) Glomerulonephritis. 11. What is the primary function of the proximal convoluted tubule (PCT)? A) Secretion of ions. B) Reabsorption of nutrients. C) Concentration of urine. D) Filtration of blood. Show Answer Correct Answer: B) Reabsorption of nutrients. 12. Juxta glomerular apparatus is a special sensitive region formed by cellular modifications in the: A) DCT and Efferent arteriole at the point of their contact. B) DCT and the Afferent arteriole at the point of their contact. C) PCT and Afferent arteriole at the point of their contact. D) PCT and Efferent ateriole at the point of their contact. Show Answer Correct Answer: B) DCT and the Afferent arteriole at the point of their contact. 13. Which of the following is responsible for the increase in sodium reabsorption in DCT? A) Increase in aldosterone levels. B) Increase in antidiuretic hormone levels. C) Decrease in antidiuretic hormone levels. D) Decrease in aldosterone levels. Show Answer Correct Answer: A) Increase in aldosterone levels. 14. Which of the following is the organ of excretion in mollusca? A) Keber"s organ. B) Coxal gland. C) Organ of Bojanus. D) Both a & c. Show Answer Correct Answer: D) Both a & c. 15. What is the primary excretory structure in Platyhelminthes? A) Malpighian Tubules. B) Flame Cells. C) Nephridia. D) Kidneys. Show Answer Correct Answer: B) Flame Cells. 16. What is the average weight of a human kidney? A) 200-250 g. B) 50-70 g. C) 300-350 g. D) 120-170 g. Show Answer Correct Answer: D) 120-170 g. 17. Which of the following is not part of renin angiotensin mechanism? A) Aldosterone. B) Rennin. C) Angiotensin. D) Angiotensinogen. Show Answer Correct Answer: B) Rennin. 18. Creatinine is formed by- A) Uric acid. B) Kidney. C) Breakdown of creatine phosphate in muscle. D) Urea. Show Answer Correct Answer: C) Breakdown of creatine phosphate in muscle. 19. Uricotelic mode of excreting nitrogenous wastes isfound in A) Reptiles and birds. B) Birds and annelids. C) Amphibians and reptiles. D) Insects and amphibians. Show Answer Correct Answer: A) Reptiles and birds. 20. As the concentrated filtrate pass upwards in ascending limb of Henley's loop it gets? A) More concentrated. B) Diluted. C) Almost same. D) None. Show Answer Correct Answer: B) Diluted. 21. What is the role of the loop of Henle in the nephron? A) Reabsorption of glucose. B) Filtration of blood. C) Concentration of urine. D) Secretion of ions. Show Answer Correct Answer: C) Concentration of urine. 22. Which option shows correct Osmolarity variation from cortex to inner medulla (in mOsmol-1) A) 300-1200. B) Only 300. C) 1200-300. D) 400-1200. Show Answer Correct Answer: A) 300-1200. 23. Assertion:Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces as ammonium ions.Reason:Ammonia can be easily removed via kidneys.1. Both assertion and reason are true and reason is its correct explanation2. Both assertion and reason are correct but reason is not its correct explanation3. Assertion is correct but reason is false4. Both assertion and reason are false A) 3. B) 2. C) 4. D) 1. Show Answer Correct Answer: A) 3. 24. As ammonia is readily soluble, it is generally excreted by A) Diffusion. B) Osmosis. C) All of the above. D) None of the above. Show Answer Correct Answer: A) Diffusion. 25. What is the term for the elimination of urine from the body? A) Secretion. B) Filtration. C) Reabsorption. D) Micturition. Show Answer Correct Answer: D) Micturition. 26. Which of the following structures is involved in osmoregulation? A) Nephridia. B) All of the above. C) Protonephridia. D) Malpighian Tubules. Show Answer Correct Answer: B) All of the above. 27. What is the primary role of the distal convoluted tubule (DCT)? A) Filtration. B) Concentration of urine. C) Reabsorption of water. D) Secretion of ions. Show Answer Correct Answer: D) Secretion of ions. 28. Of the filtrate, nearly how many of it is reabsorbed by the renal tubules? A) 25%. B) 5%. C) 99%. D) 50%. Show Answer Correct Answer: C) 99%. 29. The functioning of the kidneys is efficiently monitored and regulated by hormonal feedback mechanisms involving- A) Hypothalamus only. B) JGA only. C) The heart only. D) Hypothalamus, JGA and heart (to certain extent). Show Answer Correct Answer: D) Hypothalamus, JGA and heart (to certain extent). 30. Kidney failure is treatable. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 31. What is the average daily urine output for an adult human? A) 2-3 liters. B) 3-4 liters. C) 1-1.5 liters. D) 500 ml. Show Answer Correct Answer: C) 1-1.5 liters. 32. What is the role of the liver in excretion? A) Produces urine. B) Secretes bile. C) Regulates blood pressure. D) Filters blood. Show Answer Correct Answer: B) Secretes bile. 33. Which of the following processes of osmoregulation by the kidney is the least selective? A) Reabsorption. B) Salt pumping to control osmolarity. C) Filtration. D) H$^{+}$ pumping to control pH. Show Answer Correct Answer: C) Filtration. 34. Statement I-The ascending limb is permeable to water.Statement II-It allows transport of electrolytes only passively. A) Both the statement are correct. B) Both the statements are incorrect. C) Only statement I is correct. D) Only statement II is incorrect. Show Answer Correct Answer: B) Both the statements are incorrect. 35. In glomerulus, afferent arteriole- A) Is wider than efferent arteriole. B) Is narrower than efferent arteriole. C) And efferent arteriole have similar diameter. D) Is narrow than efferent capillaries. Show Answer Correct Answer: A) Is wider than efferent arteriole. 36. Which of the following statements regarding renal handling of water by the kidneys is correct? A) In the absence of vasopressin, the cortical collecting ducts have very low permeability to water. B) In the absence of vasopressin, the distal tubules secrete water. C) In the absence of vasopressin, water cannot be reabsorbed in the proximal tubules. D) In the absence of vasopressin, urine is isoosmotic with plasma. Show Answer Correct Answer: A) In the absence of vasopressin, the cortical collecting ducts have very low permeability to water. 37. PCT is lined by which epithelium? A) Simple Cuboidal Epithelium. B) Compound Epithelium. C) Simple Squamous Epithelium. D) Simple Columnar Epithelium. Show Answer Correct Answer: A) Simple Cuboidal Epithelium. 38. ..... are cells present in the Bowman capsule that wrap around the capillaries of the glomerulus. A) Ciliated epithelium. B) Zymogenic cells. C) Parietal cells. D) Podocytes. Show Answer Correct Answer: D) Podocytes. 39. Which segment is responsible for Conditional reabsorption of Na+ and water? A) Descending limb of Henley's loop. B) DCT. C) Ascending limb of Henley's loop. D) PCT. Show Answer Correct Answer: B) DCT. 40. Which one plays an important role in counter current mechanism? A) Vasa recta. B) PCT. C) Loop of Henle. D) A and c. Show Answer Correct Answer: D) A and c. 41. Glycosuria and Ketonuria in urine are indicative of A) Diabetes incipidus. B) Diabetes mellitus. C) Renal calculi. D) Glomerulonephritis. Show Answer Correct Answer: B) Diabetes mellitus. 42. Counter current mechanism into maintain the concentration gradient in the medullary interstitium. This special arrangement occurs in:- A) PCT and capillary net. B) DCT and PCT. C) Henle's loop and vasa recta. D) PCT and collecting duct. Show Answer Correct Answer: C) Henle's loop and vasa recta. 43. Effective filtration pressure in the glomerulus is caused due to A) The powerful pumping action of the heart. B) Secretion of adrenaline. C) Afferent arteriole has slightly larger diameter than efferent arteriole. D) None. Show Answer Correct Answer: C) Afferent arteriole has slightly larger diameter than efferent arteriole. 44. Which of the following statements is wrong about the human excretory system? A) Excretory system consists of one pair of bean shaped kidneys, one pair of ureter, a urinary bladder and a urethra. B) Kidneys are situated between the 12th thoracic and 3rd lumbar vertebrae close to the dorsal wall in abdominal cavity. C) Right kidney is a little higher level than the left one. D) All. Show Answer Correct Answer: C) Right kidney is a little higher level than the left one. 45. The urine a man is very dilute and the quantity of urine is too much and dehydration has started in his body and he is very thirsty by the cause of A) Hypersecretion of ADH. B) Hyposecretion of ADH. C) None. D) Kidney failure. Show Answer Correct Answer: B) Hyposecretion of ADH. 46. Which of the following statements are correct?A)An excessive loss of body fluid from the body switches of osmoreceptorsB)ADH facilitates water reabsorption to prevent diuresisC) ANF causes vasodilationD)ADH causes increasing blood pressureE)ADH is responsible for decrease in GFRChoose the correct option given below A) A, B&E only. B) B, C & D only. C) A&B only. D) C, D &E only. Show Answer Correct Answer: B) B, C & D only. 47. Tubular secretion helps to maintain a proper acid-base balance by removing one of the following from blood- A) H$^{+}$ and NH$_{3}$. B) Uric acid. C) H$^{+}$ and urea. D) NH$_{3}$ and creatinine. Show Answer Correct Answer: A) H$^{+}$ and NH$_{3}$. 48. Juxta medullary Nephrons are Characterised by A) Smaller afferent arteriole. B) Bowmen's capsule with cuboidal epithelium. C) Loop of Henle very long and extend into the medulla. D) Loop of Henle is short. Show Answer Correct Answer: C) Loop of Henle very long and extend into the medulla. 49. Glucose is mainly absorbed in A) Henle'loop. B) DCT. C) PCT. D) Nephron. Show Answer Correct Answer: C) PCT. 50. Which of the following would contain blood in a normally functioning nephron?(a) (b) (c)(d) A) Bowman's capsule. B) Loop of Henle. C) Vasa recta. D) Proximal tubule. Show Answer Correct Answer: C) Vasa recta. ← PreviousRelated QuizzesScience QuizzesClass 11 QuizzesClass 11 Biology Chapter 19 Excretory Products And Their Elimination Quiz 1Class 11 Biology Chapter 19 Excretory Products And Their Elimination Quiz 2Class 11 Biology Chapter 19 Excretory Products And Their Elimination Quiz 3Class 11 Biology Chapter 1 The Living World QuizClass 11 Biology Chapter 10 Cell Cycle And Cell Division QuizClass 11 Biology Chapter 11 Transport In Plants QuizClass 11 Biology Chapter 12 Mineral Nutrition QuizClass 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books