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

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

Options:
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

Options:
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

Options:
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

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