Class 11- Biology- chapter 16- Excretory Products and their Elimination InstructionTotal Questions : 20Total time :20 minTotal Marks : 20 x 3 = 60 MarksEach Correct Question carries : 3 MarksEach incorrect Question Carries : -1 MarksEach Unattempted Question carry : 0 MarksBe careful On Negative Markings 1. Ducts of Bellini open in Renal sinus Minor calyx Renal pyramid Major calyx None 2. Column of Bertin is extension of Cortex into medulla Renal pelvis into renal, sinus Medulla into cortex Renal-capsule into cortex None 3. Complete the following paragraph by selecting the option that correctly fills the blanks (i) - (iv).The kidneys have built-in mechanisms for the regulation of glomerular filtration rate. One such efficient mechanism is carried out by (i). It is a special sensitive region formed by cellular modifications in the (ii) and the (iii) at the location of their contact. A fall in GFR can activate the JG cells to release (iv) which can stimulate to glomerular blood flow and thereby brings GFR back to normal. ANF PCT Efferent arteriole Angiotensin ANF DCT Afferent arteriole Renin JGA DCT Afferent arteriole Renin JGA PCT Efferent arteriole Angiotensinogen None 4. lonosnic pathway occurs in Uricotelism Ureotelism Ammonotelism Guanotelism None 5. How many molecules of ammonia are required to form 8 molecules of urea? 8 4 34 16 None 6. Which of the following statement is false Nephrons perform excretion through filtration, reabsorption and secretion. Nephridia are accessory excretory organs in Prawn Tapeworm have excretory flame cells Nephrons begin with Bowmen's capsule having glomerulus None 7. The function of counter current mechanism is performed byI. GillsII. KidneysIII. IntestinesIV. Lungs I, II, and IV I, II, III, and IV II and IV only I and III only None 8. Study the following. (i) Uricase enzyme is not found in apes and man.(ii) Purine metabolism leads to the formation of uric acid.(iii) In ureotelic organisms, carbondioxideCO2 and ammonia converted into urea through the Cori cycle.(iv) More energy consumed is for the production of uric acid.(v) TMO (Trimethylamine oxide) protects the proteins from the effect of urea in Chondrichthyes fishes. Which of the given statements are correct? All, except V All, except IV All, except II All, except III None 9. Which one of the following statements is correct with respect to salt water balance inside the body of living organisms? Paramecium discharges concentrated salt solution by contractile vacuoles. When water is not available camels do not produce urine but store urea in tissues. The body fluids of fresh water animals are generally hypotonic to surrounding water. Salmon fish excretes lot of stored saIt through gill membrane in fresh water. None 10. Which one of the following statements in regard to the excretion by the human kidneys is correct ? Nearly 99% of glomerular filtrate is reabsorbed by renal tubules Ascending limb of loop of Henle in impermeable to electrolytes Descending limb of loop of Henle, impermeable to water Distal convoluted tubule is incapable reabsorbing 𝐻 𝐶 𝑂 3 None 11. Which of the following statements is incorrect? The medullary zone of kidney is divided into a few conical masses called medullary pyramid projecting into the calyces. Glomerulus along with Bowman's capsule is called the renal corpuscle. Inside the kidney the cortical region extends in between the medullary pyramids as renal pelvis. Renal corpuscle, proximal convoluted tubule (PCT) and distal convoluted tubule(DCT) of the nephron are situated in the cortical region of kidney. None 12. The excretory material of bony fish is Urea Ammonia Amino acid Protein None 13. The nephrons discharge their urine at the Renal pyramid Urethra Urinary bladder Renal pelvis None 14. Mark the inappropriate term w.r.t. the glomerular filtration. Passive process Occurs due to pressure difference Active process Non selective None 15. Which is not part of renal pyramid Convoluted tubules Collecting ducts Peritubular capillaries Loop of Henle None 16. The filtrate from the glomerulus contains Urea and uric acid Urea, uric acid, glucose and water Urea, uric acid, ammonia and water Urea, uric acid and ammonia None 17. If kidneys fail to reabsorb water, the effect on tissue would Remain unaffected Absorb water from blood plasma Shrink and shrivel Take more O2 from the blood None 18. Which disease is caused due to high accumulation of uric acid in the bloodstream? Hypouremia Hyperuricemia Uremia Hyperuremia None 19. Connecting tubule acts as part of which organ Liver Pancreas Kidney Heart None 20. The urine under normal conditions does not contain glucose because The normal blood sugar is fructose. Glucose in glomerular filtrate is reabsorbed in the uriniferous tubules. Glucose of blood is not filtered in the glomerulus. Glucose in glomerular filtrate is converted into glycogen. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
