CARDIOVASCULAR SYSTEM

1) Parasympathetic stimulation of heart causes:

A. SA node decreases firing

B. Increased AV node excitability

C. Decreased ventricular contraction

D. Tachycardia 

2)Stroke output of each ventricle in normal adult is:

A. 30 ml

 B. 130 ml

C. 70 ml 

D. 5 liters 

3) Stimulation of baroreceptor leads to:

A. Increased blood pressure, increased heart rate

B. Decreased B.P, decreased heart rate

C. Increased B.P, decreased heart rate

D. Decreased B.P, increased heart rate 

4). Closure of aortic vavle occurs before the following event:

A. Isovolumetric contraction

B. Isovolumetric relaxation

C. Pre diastole

D. Pre systole 

5) Conduction velocity is least in:

A. AV node 

B. Bundle of His

C. SA node 

D. Purkinje fibers