1. release of synaptic vesicles from the presynaptic terminals is inhibited byinhibition of conduction of nerve impulseprevention of Ca2+ influxprevention of Na2+ influxpreventing depolarisation of nerve terminalQuestion 1 of 20 2. which of the following synaptic transmitters is not a peptide, polypeptide or proteindynorphinbeta-endorphinSubstance PserotoninQuestion 2 of 20 3. Which of the following is a chemoreceptor?Rods and conesHair cellsMerkel's discOsmoreceptorsQuestion 3 of 20 4. In which of the following situation there is difference in 02 Saturation but no decrease in 02 tension:CO PoisoningRight to Left ShuntAnemiaHypoventilationQuestion 4 of 20 5. EPSP is due toCa++ influxNa+ influxK+influxNa+ effluxQuestion 5 of 20 6. What is the role of the macrophage during antibody formation?Activation of cytotoxic CD8 T cellsDelayed hypersensitivity reactionProcessing antigen and presenting it to T helper CD4 cellsLysis of virus-infected cellsQuestion 6 of 20 7. Skeletal muscle activity controlled by:Dorsal horn cellsCorticospinal tractLateral spinothalamic tractVentral horn cellsQuestion 7 of 20 8. Gastrin stimulates the secretion of HCl. Which of the following cell types located at the fundus of the stomach produces HCl?Chief cellsParietal cellsMucous cellsG cellsQuestion 8 of 20 9. Antimullerian hormone is secreted byGranulosa cellsnoneSertoli cellsLeydig cellsQuestion 9 of 20 10. Caisson diseaseTumor embolismAmniotic fluid embolismFat embolismGas embolismQuestion 10 of 20 11. Leptin is decreased in all exceptObesityStarvationAndrogenExerciseQuestion 11 of 20 12. Which of the following coagulation factors causes cross linking and stabilisation of clotFactor IXFactor VIIIfactor XIIIThrombinQuestion 12 of 20 13. Most recent taste sensation issweetumamisourbitterQuestion 13 of 20 14. Which of the following is most important for maintaining adequate cardiac output early in the course of exercise?Decreased cardiac indexIncreased heart rateIncreased stroke volumeDecreased diastolic blood pressureQuestion 14 of 20 15. increase in threshold level on applying subthreshold slowly rising stimulus is calledelectrotonusaccommodationrefractorinessadaptationQuestion 15 of 20 16. Affinity of haemoglobin at normal pH is:Affinity change with changing pHMore for carbonmonoxide than oxygenMore for carbon dioxide than oxygenEqual for carbonmonoxide and oxygenQuestion 16 of 20 17. Intercalated discs are present innoneSkeletal muscle cellSmooth muscle cellCardiac myocytesQuestion 17 of 20 18. An increase in the concentration of 2,3 biphosphoglycerate (2,3DPG) may be seen in all of the following exceptHypoxanthineHypoxiaAnemiaInosineQuestion 18 of 20 19. Dosage of Vitamin C for curing scurvy:800-l000mg/dayI00-200 mg/day80-100 mg/day8-10 gm/dayQuestion 19 of 20 20. Bilateral damage to lateral hypothalamus causesHyperthermiaHypothermiaAnorexiaIncreased sexualityQuestion 20 of 20 Loading...