Consider the following statements:

I:	70% of ventricular filling is due to the passive opening of AV valves.
II:	Lub is caused by the simultaneous closure of both AV valves.
III:	Dub is caused by simultaneous closure of both the semilunar valves.

Which of the above statements are true?

1.	I and II only	2.	I and III only
3.	II and III only	4.	I, II, and III

The following is the diagrammatic representation of standard ECG. Identify the correct statement:

1. P is caused by atrial repolarization
2. Q, when present, always shows myocardial ischemia
3. QRS complex is due to time taken by impulse from SA node to AV node
4. T is caused by ventricular repolarization

The hepatic portal vein drains blood to liver from

Blood pressure in the mammalian aorta is maximum during
1. systole of the left atrium
2. diastole of the right ventricle
3. systole of the left ventricle
4. diastole of the right atrium

Which one of the following is correct?
1. Plasma = Blood - Lymphocytes
2. Serum = Blood + Fibrinogen
3. Lymph = Plasma + RBC + WBC
4. Blood = Plasma + RBC + WBC + Platelets

The diagram given here is the standard ECG of a normal person. The P-wave represents the

1. contraction of both the atria
2. initiation of the ventricular contraction
3. beginning of the systole
4. end of the systole

A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
1. Blood group B
2. Blood group AB
3. Blood group O
4. Blood group A

A patient brought to a hospital with myocardial infarction is normally immediately given
1. penicillin
2. streptokinase
3. cyclosporin-A
4. statins

Arteries are best defined as the vessels which

Which one of the following statements is correct regarding blood pressure?