1. Exogenous therapy with which of the following hormones would be most likely to slow or prevent osteoporosis?ThyroxineCortisolEpinephrineEstrogenQuestion 1 of 20 2. A 3-year-old child has inhaled a peanut that has lodged in the right mainstem bronchus, largely occluding it. The child is cyanotic, with a PO2 of 60 mm Hg. Which of the following mechanisms best accounts for the child's hypoxemia?Decreased PO2 in inspired airInequalities of ventilation and perfusionHypoventilation of central originDecreased capacity of pulmonary diffusionQuestion 2 of 20 3. Cerebral perfusion pressure isArterial pressue x venous pressureArterial pressure minus intracranial pressureArterial pressure minus peripheral venous pressureVenous pressure minus arterial pressureQuestion 3 of 20 4. Keratomalacia caused by deficiency of VitaminB1DACQuestion 4 of 20 5. The blood within the vessels doesnot clot normally becauseVascular endothelium is smooth and coated with glycocalyxThrombin has a positive feedback on plasminogenVitamin K antagonists are present in plasmaSodium citrate in plasma chelates calcium ionsQuestion 5 of 20 6. A patient has recurrent attacks of asthma that occur most frequently after aspirin administration. Which of the following is the pathogenetic mechanism in this form of asthma?Type I hypersensitivity reactionInhibition of cyclooxygenase pathwayDirect release of bronchoconstrictor mediatorsEnhanced sensitivity to vagal stimulationQuestion 6 of 20 7. Penile erection is mediated bysympathetic system via beta receptorsParasympathetic system via muscarinic receptorssympathetic system via alpha receptorsparasympathetic system via nicotinic receptorsQuestion 7 of 20 8. Maintenance of the corpus luteum during the first trimester of pregnancy is accomplished principally by the secretion ofantidiuretic hormone (ADH)human chorionic gonadotropin (hCG)luteinizing hormone (LH)follicle stimulating hormone (FSH)Question 8 of 20 9. Which decreases secretion of both insulin and glucagonIncreased blood glucosenoneSomatostatinEpinephrineQuestion 9 of 20 10. Maximum amount of air that can be inhaled:Inspiratory reserve volumeVital capacityTidal capacityDead spaceQuestion 10 of 20 11. which hormone increases with ageParathormoneInsulinGHProlactinQuestion 11 of 20 12. Carbon dioxide is transported in blood by a variety of mechanisms.Which of the following is quantitatively the most important method for transporting CO2?As carbaminohemoglobinAs sodium bicarbonate in serumAs CO2 in gas bubblesAs CO2 in physical solutionQuestion 12 of 20 13. Myelination in peripheral nervous system is done byAstrocytesSchwann cellsEpendymal cellsOligodendrocytesQuestion 13 of 20 14. Largest reserve of energy in body stored asBlood glucoseAdipose tissueLiver glycogenMuscle glycogenQuestion 14 of 20 15. True about G protein coupled receptorsG protein is bound to GTP in resting stateG proteins bind to hormones on cell surfaceAll the three subunits: alpha,beta and gamma should bind to each other for G protein to actG proteins act as inhibitory and excitatory because of difference in alpha subunitQuestion 15 of 20 16. An infant has a coarctation of the aorta that reduces renal blood flow to 50% lower than normal. Which of the following is increased in this infant?Plasma levels of angiotensin IIRenal excretion of sodiumGlomerular filtration rateBlood flow in the lower bodyQuestion 16 of 20 17. which of the following adaptation will be apt to increase the work capacity at high altitudeincreasing workload ,decreasing duration of exerciseincresing workload,increasing duration of exercisedecreasing workload,decreasing duration of exercisedecreasing workload,increasing duration of exerciseQuestion 17 of 20 18. all of the following are true ablout intestinal motility exceptincreased by distensionincreased by acetylcholinedoes not depend upon gastric motilityincreased by cholecystokininQuestion 18 of 20 19. With time, blood stored in a blood bank tends to become relatively depleted of 2,3- diphosphoglycerate (2,3-DPG). What effect does this have on the hemoglobin-oxygen dissociation curve?Shifts the curve to the right, so that the hemoglobin has a decreased oxygen affinityShifts the curve to the right, so that the hemoglobin has an increased oxygen affinityShifts the curve to the left, so that the hemoglobin has a decreased oxygen affinityShifts the curve to the left so that the hemoglobin has an increased oxygen affinityQuestion 19 of 20 20. Purkinje fibres areFibrous tissueModified cardiac muscleModified nerve fibresModified smooth muscleQuestion 20 of 20 Loading...