Page 1 :
Objective Questions, Multiple Choice Questions, 04. Choose the correct path of urine in our, body., (a) KidneyUreterUrethra -Urinary, (NCERT Exemplar), 01. Which of the following organisms are, ammonotelic?, bladder, (a) Birds, (c) Reptiles, (b) Humans, (d) Aquatic animals, (b) Kidney→Urinary bladder-→ Urethra, Ureter, 02. The right kidney is placed a little higher, than the left kidney to adjust in the, abdominal cavity., (c) Kidney UreterUrinary bladder-, Urethra, (d) Urinary bladderKidneyUreter, Urethra, (b) False, (a) True, (c)Can't say, 05. The dialyser works as kidney except, does not perform, (d) Partially True/False, 03. An adult human on an average produces, (NCERT Exemplar), la)1-2 L of urine per day, (b) 1-5 L of urine per day, (c)2-5L of urine per day, (d)4-5 L of urine per day, la) osmoregulation, (b) tubular secretion, (c)selective reabsorption, (d) ultrafiltration

Page 2 :
06. Match the following columns and select, the most appropriate options from the, codes given below., 10. The liquid waste product of plants, formed due to oxidation of various, essential oil is, (b) latex, (a) gums, (c)resins, (d) tannins, Column I, Column II, A. Nephridia, Glomerulus, 1., 11. The major gaseous excretory product of, plants is, (a) carbon dioxide, (c)alkaloids, B. Bowman's capsule 2. Kidney, C. Osmoregulation, 3. Dialysis, (b) oxygen, (d) gums, D. Kidney failure, 4., Pale yellow, 12. Excretory product of oak is used in, leather treatment., E. Urine, 5. Earthworm, Codes, (b) False, (a) True, (c) Can't say, A B, (d) Partially True/False, (a) 5 1 2, (b) 1 2, (c) 2 4, (d) 5 2, 4., 3., 13. Match Column I with Column II and, choose the right answer from the codes, options given below., 3., 07. Match the Column I with Column II, and select the most appropriate option, from the codes given below., Column I, Column II, A. Initial filtrate, 1. Respiration, B. Carbon dioxide, 2., 180 L, Column I, Column II, C. Urine, 3. Tannin, A. Kidneys, 1. Urea, d. Latex, 4., Rubber, B. Renal vein, 2. No nitrogenous wastes, C. Liver, E. Oak, 5. 1-2 L per day, 3. Aquatic animals, Codes, D. Dialysing fluid, 4. Impure blood, CD E, E. Ammonia, 5. Birds and humans, (a) 2, (b) 2, (c) 2 3, (d) 2, Codes, B, (a) 5, (b) 5, (c) 1, (d) 2, C., D., 1., Assertion-Reasoning MCQS, Direction (Q.Nos. 14-18) For the following, question numbers two statements are given, one labelled as Assertion (A) and the other, labelled as Reason (R). Select the correct, answer to these question from the codes (a), (b), (c) and (d) as given below, (a) Both A and R are true and Ris the correct, explanation ofA, (b) Both A and R are true but. R is not the correct, explanation of the A, (c) A is true, but R is false, (d) A is false, but R is true, 3, 4, 08. Dialysing unit (artificial kidney), contains a fluid which is almost same as, plasma except that it has, (a)high glucose, (c)no urea, (b) high urea, (d) high uric acid, 09. Plants release gaseous waste like CO, at, time and others like. . through, stomata and lenticels., (a) day. 0,, (c) night, 0,, ....., (b) day. CO,, (d) night. CO,, EM354, C54 3, 1UL31, EM35S, O34 13, 9210N3, 32534

Page 3 :
14. Assertion Excretion is the biological, process by which harmful wastes are, removed from an organism's body., Reason The mode of excretion is, completely same in both unicellular, and multicellular organisms., Right-, kidney, Kidney, Uretes, 15. Assertion Glomerular filtration, requires expenditure of energy by, Kidney., Reason It occurs due to pressure, difference in glomerular capillaries and, Bowman's capsule., Urinary, bladder, 16. Assertion Artificial kidney is a device, used to remove nitrogenous waste, products from the blood through, dialysis., Reason Reabsorption does not occur in, artificial kidney., (1) Which among the following is the, storage organ for urine?, (a) Urter, (c) Urinary bladder, (ii) The main function of ureter is, (al contain urine till is released out, (b) carry urine from kidney to urinary bladder, (c)guard the urethra, (d) passage through which urine is excreted, out of the body, (b) Kidney, (d) Urethra, 17. Assertion Plants excrete various, waste products during their life, processes., (iii)The diagram shows a kidney and its, associated vessels., From, heart, To, Reason They produce urea just like, humans., heart, 18. Assertion Excretion is a biological, process., Reason Gaseous products in plants are, excreted via lenticels in stem., Case Based MCOS, 19. Read the following and answer, questions from (i) to (v)., The excretory system is a passive, biological system that removes excess,, unnecessary materials from the body, fluids of an organism, so as to help, maintain internal chemical homeostasis, and prevent damage to the body., Which structure have the most and, least urea concentration?, Most, Least, (a), (b), 4, [c), 4, (d), 3.

Page 4 :
Kidneys are located in abdomen, o, other side of the backbone. Urine, produced in kidneys passes through the, ureter into the urinary bladder where, gets stored for sometime and then is, released through urethra., Each kidney is made up of one million, nephrons and each nephron consists ofa, cup-shaped upper end called Bowman, capsule containing a bunch of capillaries, called glomerulus., The Bowman's capsule leads to proximal, convoluted tubule, loop of Henle and, distal convoluted tubule which joins the, collecting duct., (i) Which among the following is the leat, toxic form of exeretory product?, (a) Urea, (c)Ammonia, one on, (iv) If Henle's loop were absent from, mammalian nephron, which one of the, following to be expected?, (a) There wil be no urine formation, (b) There will be hardly any change in the, quality and quantity of urine formed, (c) The urine will be more concentrated, (d) The urine will be more dilute, (v) Identify X, Y, Z and match with their, respective functions.., Fresh dialysis, fluid, Blood to, patient, Used dialysis, fluid, (b) Uric acid, (dico,, Blood, from patient, (ii) An outline of principal events of, urination is given below in a random, (a) X-allows, blood flow, manner., Y-returns, blood to, patient, Z-regulates, flow rate, Z-regulates, flow rate, (b) Y-returns, blood to, patient, X-keeps fluid, temperature, same as body, temperature., I. Stretch receptors on the wall of the, urinary bladder send signals to CNS., II. Bladder fills with urine and become, distended., III. Micturition, IV. CNS passes on motor messages to, initiate contraction of smooth muscle of, bladder and simultaneous relaxation of, urethral sphincter., The correct sequence of events is, (all l -IV, (b) IV I, (c) IV-→|I, (d) III-IV, (iii) A person with no/less food and beverage, intake, will have .... in urine., (a) little glucose, (c) excess urea, (iv) Glomerular filtrate is first collected by, (a) distal convoluted tubule, (b) proximal convoluted tubule, (c) Bowman's capsule, (c)Loop of Henle, (c) X-allows, blood flow, Y-regulates, blood flow, Z-returns, blood to, patient, (d) X-diffusion Y-regulate, of blood, Z-keeps fluid, temperature, same as body, temperature, blood flow, 20. Read the following and answer, questions from (i) to (v)., The organs of our excretory system help, in releasing waste from our body. If these, wastes are not removed, we may fall sick., Hence, wastes built up from cell activities, and digestion need to be removed. The, excretory system of humans consists of a, pair of kidneys, pair of ureter, a urinary, bladder and urethra., (bless urea, (d) little fat

Page 5 :
(v) The figure given, alongside, figure represents a, single nephron from, a mammalian, (a) Bowman's, capsule, Glomerulus Collecting duct, (b) Renal artery Collecting, duct, Bowman's, capsule, kidney., Identify the labelled, parts by selecting the, most appropriate, option., (c) Collecting, duct, Glomerulus Bomwan's, capsule, (d) Glomerulus, Bomwan's, Collecting duct, capsule