Top 550+ Solved Physiology MCQ Questions Answer

a. the ‘v’ wave denotes the increased atrial pressure due to the bulging of the tricuspid valve during isovolumetric ventricular contraction

b. in tricuspid insufficiency, there is a giant ‘A’ wave with each ventricular systole

c. atrial premature beats produce an ‘A’ wave

d. the ‘v’ wave occurs during systole

e. a giant ‘C’ wave (‘cannon wave’) may be seen in complete heart block

a. standing up

b. sleeping

c. eating

d. exercising

e. pregnancy

a. 2ml/100g/min

b. 9ml/g/min

c. 2ml/g/min

d. 2L/100g/min

e. 9ml/100g/min

a. the heart has 5%

b. the pulmonary circulation has the greatest percentage

c. the venous circulation has 35%

d. the aorta has 2%

e. capillaries have 20%

a. dilates vascular smooth muscle

b. produces bronchodilation

c. increase GFR and renal blood flow

d. evokes positive inotropic and chronotropic effects on myocardium

e. inhibits gluconeogenesis

a. nitric oxide

b. angiotensin II

c. insulin

d. growth factors

e. catecholamines

a. it synthesises nitrous oxide from arginine

b. there are 2 isoforms

c. it is inactivated by haemoglobin

d. NOS-1 is activated by cytokines

e. NOS-2 is in endothelial cells

a. decreased local temperature

b. myogenic theory of autoregulation

c. angiotensin II

d. increased discharge of noradrenergic vasomotor nerve

e. histamine

a. right atria at the entrance of SVC and IVC

b. aortic arch

c. left atria at the entrance of the pulmonary veins

d. pulmonary circulation

e. carotid body

a. iodine undergoes rapid oxidation following entry to thyroid cells

b. the “iodine pump” is the major source of iodine for hormone synthesis

c. TSH increases iodine uptake by the thyroid gland

d. thiocyanate and ouabain decrease iodine uptake by the thyroid gland

e. it involves iodination of thyrosine residues in thyroglobulin

a. it consists of two polypeptide chains linked by two disulphide bridges

b. the majority of exogenous insulin is metabolised by the liver

c. it is not the only molecule responsible for insulin-like activity in the blood

d. it increases intracellular potassium concentration

e. exercise increases the affinity of its receptors for insulin

a. T4

b. DIT

c. MIT

d. T3

e. RT3

a. growth hormone

b. adrenaline

c. glucagon

d. noradrenaline

e. cortisol

a. T4

b. DIT

c. MIT

d. T3

e. RT3

a. it induces lipoprotein lipase which actively hydrolyses triglyceride from circulating lipoproteins

b. it reduces circulating free fatty acids

c. it promotes triglyceride storage in adipocytes

d. it directly inhibits intracellular lipase

e. its effects appear to involve phosphorylation of lipases