1. the primary action of nitric oxide in the gastrointestinal tract isgastrointestinal smooth muscle relaxationvasodilationgastrointestinal smooth muscle contractionvasoconstrictionQuestion 1 of 20 2. Reciprocal inhibition isContraction of both agonist and antagonistRelaxation both agonist and antagonistsContraction of agonist with relaxation of antagonistContraction of antagonist with relaxation of agonistQuestion 2 of 20 3. which ion is most important for neurotransmitter releasesodiumcalciumpotassiumchlorideQuestion 3 of 20 4. Glucagon activates which enzymeNonePepsinogenAdenylyl cyclaseTrypsinogenQuestion 4 of 20 5. which of the following is not a physioogical method of heat loss from the bodyperipheral vasoconstrictionposturevasodilationsweatingQuestion 5 of 20 6. Which of the following receptors and sense organs are incorrectly pairedrods and cones:eyeReceptors sensitive to stretch: carotid sinushair cells: olfactory epitheliumreceptors sensitive to sodium: taste budsQuestion 6 of 20 7. True about bezold-jarish reflexHyperpneaHypotensionTachycardiaHypertensionQuestion 7 of 20 8. Countercurrent mechanism in the kidney is responsible forMaintenance of blood flowOsmotic gradient in medullaSecretion of uric acidAbsorption of glucoseQuestion 8 of 20 9. interleukins and growth factors areneurotransmittersphosphoproteinasesmatrix metalloproteinaseshormonesQuestion 9 of 20 10. Measurement of the blood pressure of a 65-year-old man reveals a systolic pressure of 190 mm Hg and a diastolic pressure of 100 mm Hg. His pulse is 74/min and pulse pressure is 90 mm Hg. A decrease in which of the following is the most likely explanation for the high pulse pressure?Myocardial contractilityCardiac outputArterial complianceStroke volumeQuestion 10 of 20 11. Active tension in a muscle depends uponAerobic capacity of muscleLength of muscle fiberNumber of motor units recruitedNumber of Muscle fibresQuestion 11 of 20 12. Anti inflammatory action of steroids due toincreased activity of lipolipaseInhibition of cyclo-oxygenaseInhibition of lipo-oxygenaseInhibition of phospholipase A2Question 12 of 20 13. Fast fatigable motor unit recruitedFirstNoneLastDuring relaxationQuestion 13 of 20 14. posterior column transmits all exceptmotiontemperaturevibrationpressureQuestion 14 of 20 15. normal pH of stomach is8 to 97 to 7.211 to 124 to 5Question 15 of 20 16. What role do the lungs play in the pathogenesis of systemic hypertension?The type II pneumocytes contain aldosteroneThe alveolar capillaries contain angiotensin-converting enzyme (ACE)The alveolar capillaries contain aldosteroneThe alveolar capillaries contain antidiuretic hormone (ADH)Question 16 of 20 17. Increasing urine flow rate from 1 mL/min to 10 mL/min will significantly increase the clearance ofureacreatininepenicillininulinQuestion 17 of 20 18. During the early stages of infection, which of the following compounds exert the most powerful chemotactic effect on neutrophils, causing them to migrate into an inflamed area?C5a and IL-8PGI2 and PGD2LTC4 and LTD4IL-1 and tumor necrosis factorQuestion 18 of 20 19. Inhibition of which of the following could be responsible for impotence as a side effect of a medication?Nitric oxide synthase (NOS)OxytocinConversion of DHT to testosteroneForward motility factorQuestion 19 of 20 20. Hyperthyroid state is characterised byLipolysisIncreased protein synthesisIncreased cholesterolDecreased glycolysisQuestion 20 of 20 Loading...