Q.1: Nitrous oxide brings about its action by activation of

A) Guanylate cyclose
B) Protein kinase A
C) Phospholipase C
D) Phospholipase A2
Q.2: Bipolar limb leads helps in the diagnosis of

A) Diseases of inter ventricular septum
B) Diseases of left ventricular myocardium
C) Arrhythmias of heart
D) All of the above
Q.3: Which of the following is last to be depolarized

A) Apex of the left ventricle
B) Endocardium of the left ventricle
C) Base of the left ventricle
D) Lower most portion of the interventricular septum
Q.4: One millimetre horizontal distance in ECG paper is equivalent to

A) 4 seconds
B) 0.04 seconds
C) 0.04 milliseconds
D) 1 second
Q.5: Which of the following is NOT a property of a cardiac muscle

A) Excitability
B) Conductivity
C) Rhythmicity
D) Short refractory period
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