Q. No.The human heart:
| 1. | is derived from embryonic endoderm. |
| 2. | is situated in the thoracic cavity, in between the two lungs. |
| 3. | has the size and shape of a baseball. |
| 4. | is protected by a single walled membranous bag, pericardium. |
Subtopic: Human Heart: Gross Anatomy | Human Heart: Double Circulation |
93%
From NCERT
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Consider the given two statements:
| Assertion(A): | Blood flows through the human heart in a single, continuous circuit. |
| Reason(R): | The human heart has four chambers - two auricles and two ventricles. |
| 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. | (A) is False but (R) is True. |
Subtopic: Human Heart: Gross Anatomy | Human Heart: Double Circulation |
85%
From NCERT
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During ventricular contraction in a cardiac cycle:
| 1. | the AV valves close earlier than the opening of semi lunar vales |
| 2. | the AV valves close earlier than the closure of semi lunar vales |
| 3. | the AV valves close later than the opening of semi lunar vales |
| 4. | the closure of AV valves and opening of semi lunar valves occur simultaneously |
Subtopic: Human Heart: Double Circulation |
62%
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Which among the following is correct during each cardiac cycle?
| 1. | The volume of blood pumped by right and left ventricles is same |
| 2. | The volume of blood pumped by right and left ventricles is different |
| 3. | The volume of blood received by right and left atria is different |
| 4. | The volume of blood received by pulmonary arteries and aorta is different |
Subtopic: Human Heart: Double Circulation |
72%
From NCERT
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Blood enters the heart because muscles of the:
| 1. | ventricles relax | 2. | ventricles contract |
| 3. | atria relax | 4. | atria contract |
Subtopic: Human Heart: Double Circulation |
69%
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Both heart rate and stroke volume in a human get doubled during exercise. His cardiac output will:
| 1. | double | 2. | become four times |
| 3. | become eight times | 4. | remain the same |
Subtopic: Human Heart: Double Circulation |
80%
From NCERT
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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
Subtopic: Human Heart: Double Circulation |
83%
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The innermost layer of blood vessel walls made up of one layer of endothelium and in direct contact with the blood is:
| 1. tunica adventitia | 2. tunica intima |
| 3. tunica media | 4. tunica muscularis |
Subtopic: Human Heart: Double Circulation |
80%
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At which point, the pulmonary artery is different from the pulmonary vein:
1. Its lumen is broad
2. Its wall is thick
3. It has valves
4. It does not possess endothelium
Subtopic: Human Heart: Double Circulation |
68%
From NCERT
AIPMT - 2000
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Identify the correctly matched pairs:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| Layer in the wall of artery/vein | Made up of | |
| I: | Tunica intima | Squamous epithelium |
| II: | Tunica media | Skeletal muscle/elastic fibres |
| III: | Tunica externa | Fibrous connective tissue |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Human Heart: Double Circulation |
56%
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