The period of systole is represented on surface ECG as between:
1. Beginning of P wave and beginning of Q wave
2. End of S wave and beginning of T wave
3. Shortly after Q wave and end of the T wave
4. Two successive R waves

Which of the following can be called as a ‘cascade’ process?

The deoxygenated blood from the cardiac muscles is returned to the right atrium by:

Identify the incorrectly matched pair:
1. Average duration of a cardiac cycle: 0.8 sec
2. Stroke volume of each ventricle: 120 ml
3. Highest normal systolic blood pressure: 140 mm Hg
4. Highest normal diastolic blood pressure: 90 mm Hg

To begin the blood clot formation cascade, the enzyme complex required is:

A person has type A antigen on RBC and anti-B antibodies in plasma. He can receive blood from a person with blood group:

In the nodal tissue of the human heart, a conduction delay is seen in:

All vertebrates posses a:

To prevent eryhtroblastosis fetalis in future pregnancies:

With the help of ECG tracings, the heart rate of the person can be calculated by:
1. measuring the size of the PR or PQ interval
2. counting the number of QRS complexes in a given period of time
3. counting the number of T waves between two successive QRS complexes
4. measuring the size of the QRS complexes