MCQs Week 20 Loading... 1. With respect to protein digestion and absorption Absorption of amino acids from the gastrointestinal tract is coupled to ion transportD and L amino acids are absorbed by the same carriersPepsins have an optimum pH of 5.6 to 7.2Pepsinsinogen is the active form of the enzyme Loading... 2. Gallbladder contraction is primarily controlled by CholecystokininInsulinSecretinGlucagon Loading... 3. A patient is hypertensive with a potassium of 6.7. Which of the following is LEAST likely to be the cause Potassium supplementationFurosemideACE inhibitorsSuxamethonium Loading... 4. A patient comes in staggering, agitated and hyperthermic with dilated pupils. Which overdose is LEAST likely as a cause? AtropineAmphetamineAngels trumpetAspirin Loading... 5. In the anatomical position the heart Has a right border comprised of a right ventricleHas an anterior surface comprised of right atrium, right ventricle and a strip of the left ventricleHas an inferior border formed mainly by the left ventricleHas an inferior surface comprised of left atrium, inferior vena cava and right ventricle Loading... 6. Which of the following is NOT part of the normal gastrointestinal tract defence against infection? Secreted IgG antibodiesDefensinsPancreatic enzymesGastric acid Loading... 7. All of the following are true of the phrenic nerve EXCEPT It is formed principally from C4It runs down the anterior surface of scalenus anteriorIs it the sole motor supply to the diaphragmIt runs posterior to the lung root Loading... 8. Activated charcoal will bind to all of the following EXCEPT TheophyllineCarbamazepinePotassiumPhenobarbitol Loading... 9. Which of the following increases the risk of digoxin induced arrhythmias? HyperkalaemiaHypercalcaemiaHypermagnasaemiaHypernatraemia Loading... 10. Regarding lead toxicity, which of the following is correct? Prolonged exposure often results in macrocytic anaemiaYoung children absorb around 10% of ingested inorganic leadLead induced peripheral neuropathy classically involves upper limb extensors resulting in wrist dropHigh dose organic lead poisoning usually results in a life-threatening progressive pneumonitis Loading... 11. Which of the following features of organophosphate poisoning is NOT due to muscarinic effects? SalivationTachycardiaBronchospasmVomiting Loading... 12. Which of the following statements about the oesophagus is FALSE? It begins at the level of C6The pharyngo-oesophageal junction is its narrowest partIt is bordered bilaterally by the recurrent laryngeal nervesIt is made up of smooth involuntary muscle Loading... 13. Which of the following statements regarding pathology of the gastrointestinal tract is INCORRECT? Ascending colonic involvement doubles the mortality rates in ischaemic colonic diseaseAngiodysplasia accounts for 20% of major episodes of bleeding from the lower GI tratctPseudomembranous colitis can occur with any necrotising infection of the bowelNon-caseating granulomas are a features of ulcerative colitis Loading... 14. A patient in their late teens presents with a long history of weight loss, intermittent loose stools, and is found to have a rectal abscess. Which of the following conditions is most likely? Coeliac diseaseCrohn diseaseCystic fibrosisUlcerative colitis Loading... 15. With regards ischaemic bowel disease Crypt hyperplasia, villous atrophy and elevated intra-epithelial CD8+ levels is characteristicIt can follow cocaine useIt most commonly affects men over 50yrs of ageUntreated, mortality is 10% Loading...
