Q. No.QRS complexes on the ECG tracings show that:
1. The atria are depolarizing.
2. The ventricles are depolarizing.
3. The ventricles are repolarizing.
4. The heart is at rest.
1. The atria are depolarizing.
2. The ventricles are depolarizing.
3. The ventricles are repolarizing.
4. The heart is at rest.
The most common WBC under normal physiological conditions are:
| 1. | Neutrophils | 2. | Macrophages |
| 3. | Monocytes | 4. | Lymphocytes |
The chamber with the thickest musculature in the human heart would be:
| 1. | the right atrium | 2. | the left atrium |
| 3. | the left ventricle | 4. | the right ventricle |
The period of the cardiac cycle where the greatest amount of ventricular filling occurs is:
1. the first one-third of diastole.
2. the middle one-third of diastole.
3. the last one-third of diastole.
4. ventricular systole.
| 1. | atrial systole | 2. | atrial diastole |
| 3. | ventricular systole | 4. | ventricular diastole |
Coagulation of blood can be prevented by removal of which of the following in the blood?
| 1. | transferrin | 2. | iron |
| 3. | antibodies | 4. | calcium |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | When the ventricles are in systole, the atria are in diastole. |
| Reason (R): | All four chambers of the heart can never be in systole or diastole together. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
A tricuspid valve will prevent flow of blood from:
1. Right atrium to right ventricle
2. Right ventricle to right atrium
3. Left atrium to left ventricle
4. Left ventricle to left atrium
A chest pain or pressure, usually due to not enough blood flow to the heart muscle, is known as:
| 1. | hypoxia | 2. | infarction |
| 3. | angina | 4. | diaphoresis |
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