Top 80+ Solved Cardiovascular MCQ Questions Answer

a. hypernatraemia is associated with low voltage complexes

b. the first change in hyperkalaemia is prolongation of QRS

c. with hypokalaemia, the resting membrane potential decreases

d. in hyperkalaemia, the heart stops in systole

e. in hypercalcaemia, myocardial contractility is enhanced

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. the total volume of CSF is 300mL

b. CSF is absorbed through the choroid plexus

c. the average CSF pressure is 220m-CSF

d. CSF has a higher pH than plasma

e. it contains very low levels of cholesterol relative to plasma

a. Ca2+

b. K+

c. Na+

d. PCO2

e. glucose

a. maternal artery

b. maternal vein

c. uterine vein

d. umbilical vein

e. umbilical artery

a. diastolic BP increases more than systolic BP

b. regional blood flow to the brain doubles

c. cardiac output may increase 15-fold

d. after exercise, BP takes longer to return to normal than heart rate

e. O2 consumption of skeletal muscle may increase 100-fold

a. causes a decrease in atrial pressure

b. causes the ‘A’ wave of the jugular pulse

c. causes the ‘C’ wave of the jugular pulse

d. causes the ‘V’ wave of the jugular pulse

e. causes the dicrotic notch of the aortic pulse