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Q. No.The sinoatrial node (SAN) in the human heart is present in:
1. the right upper corner of the right atrium.
2. the right atrium near the base of inter-atrial septum.
3. the left lower corner of the left atrium.
3. the left atrium near the base of inter-atrial septum.
Subtopic: Human Heart: Gross Anatomy |
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During cardiac cycle:
| 1. | all the four chambers of heart can never be in a relaxed state simultaneously. |
| 2. | as the tricuspid valve gets open, blood from the pulmonary artery flows into the right ventricle. |
| 3. | all the four chambers of heart can never be in a contracted state simultaneously. |
| 4. | as the bicuspid valve gets open, blood from the aorta flows into the left ventricle. |
Subtopic: Human Heart: Cardiac Cycle |
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The atrial systole increases the flow of blood into the ventricles by about:
| 1. | 10 percent | 2. | 30 percent |
| 3. | 50 percent | 4. | 70 percent |
Subtopic: Human Heart: Cardiac Cycle |
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During ventricular diastole:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | closure of semilunar valves occurs. |
| II: | the tricuspid and bicuspid valves are pushed open. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Human Heart: Cardiac Cycle |
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If the average duration of cardiac cycle were 0.6 seconds, the number of cardiac cycles per minute will be about:
| 1. | 60 | 2. | 75 |
| 3. | 72 | 4. | 100 |
Subtopic: Human Heart: Cardiac Cycle |
64%
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Consider the two statements:
| Assertion(A): | The cardiac output of an athlete will be much higher than that of an ordinary man. |
| Reason(R): | The body has the ability to alter the stroke volume as well as the heart rate and thereby the cardiac output. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
| 4. | (A) is False and (R) is True. |
Subtopic: Human Heart: Cardiac Cycle |
65%
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Consider the two statements:
| Assertion (A): | Any deviation from the normal shape of ECG indicates a possible abnormality or disease. |
| Reason (R): | The ECGs obtained from different individuals have roughly the same shape for a given lead configuration. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: ECG & Coronary Artery Disease |
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Consider the two statements:
| Assertion (A): | Adrenal medullary hormones can increase the cardiac output. |
| Reason (R): | Adrenal medullary hormones are steroids with prominent effects on osmoregulation and glucose homeostasis in human body. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Regulation of Cardiac Activity |
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Consider the two statements:
| Assertion (A): | The human heart is called as myogenic. |
| Reason (R): | The human heart is made up of cardiac muscles. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Regulation of Cardiac Activity |
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Consider the two statements:
| Assertion (A): | Heart failure is sometimes called congestive heart failure. |
| Reason (R): | Heart failure means the state of heart when it is not pumping blood effectively enough to meet the needs of the body. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: DISORDERS OF CIRCULATORY SYSTEM |
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