MCQ Chapter 15 Biology Class 11 Maharashtra Board Excretion and Osmoregulation 1. What does renin convert in the blood?Angiotensin II to angiotensin IAngiotensinogen to angiotensin IAldosterone to reninADH to angiotensinQuestion 1 of 202. What is the role of angiotensin II in the kidney?Dilates arteriolesStimulates Na+ and water reabsorptionInhibits ADH releaseReduces blood pressureQuestion 2 of 203. What hormone inhibits Na+ reabsorption in the collecting ducts?ADHAldosteroneAtrial natriuretic peptide (ANP)ReninQuestion 3 of 204. What is the composition of sweat?Glucose and amino acidsWater, NaCl, lactic acid, and ureaUric acid and creatinineBilirubin and urochromeQuestion 4 of 205. What is the primary role of sebaceous glands in excretion?Excrete waterSecrete sebum to lubricate skinExcrete ammoniaRegulate blood pressureQuestion 5 of 206. What volatile substances are excreted by the lungs?Urea and ammoniaCO2 and water vapourGlucose and amino acidsSodium and chlorideQuestion 6 of 207. What indicates injury to the endothelial capsular membrane in the kidney?Presence of glucose in urineExcessive albumin in urineLow creatinine levelsAbsence of ureaQuestion 7 of 208. What may cause the presence of ketone bodies in urine?High water intakeDiabetes mellitus or starvationLow protein dietExcessive sweatingQuestion 8 of 209. What type of kidney stones are formed due to bacterial infection?Calcium stonesStruvite stonesUric acid stonesCystine stonesQuestion 9 of 2010. What is uremia?Inflammation of the kidneysPresence of blood in urineBlood urea levels above 0.05%Formation of kidney stonesQuestion 10 of 2011. What characterizes nephritis?Low blood pressureProteinuria due to increased glomerular permeabilityHigh glucose in urineAbsence of urea in bloodQuestion 11 of 2012. What is acute renal failure (ARF) characterized by?Increased urine outputSudden worsening of renal functionChronic decline in GFRHigh blood sugar levelsQuestion 12 of 2013. What is the purpose of heparin in haemodialysis?To increase blood pressureTo prevent blood clottingTo filter wasteTo concentrate urineQuestion 13 of 2014. What acts as the semipermeable membrane in peritoneal dialysis?Cellophane tubePeritoneal membraneRenal arteryUreterQuestion 14 of 2015. Why are immunosuppressants administered during kidney transplants?To increase blood pressureTo prevent rejection of the transplanted kidneyTo enhance urine productionTo reduce creatinine levelsQuestion 15 of 2016. Which part of the nephron is responsible for water reabsorption under ADH influence?Proximal convoluted tubuleLoop of HenleCollecting ductGlomerulusQuestion 16 of 2017. What is the primary function of the Loop of Henle?Filtration of bloodSelective reabsorption of glucoseOsmoregulation through countercurrent mechanismSecretion of creatinineQuestion 17 of 2018. What is the normal specific gravity of urine?1.021.051.101.15Question 18 of 2019. What is the significance of casts being absent in a urine report?Indicates kidney infectionSuggests normal kidney functionShows high glucose levelsImplies dehydrationQuestion 19 of 2020. What adaptation allows vampire bats to excrete dilute urine while feeding?Long Loop of HenleRapid change in urine osmolarityHigh ADH secretionAbsence of nephronsQuestion 20 of 20 Loading...
Leave a Reply