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Q. No.Three chamber heart of frog is not as efficient as four chambered human heart because :-
1. Oxygenated and deoxygenated blood mix up
2. Ventricle does not pump blood properly
3. It does not hold enough blood
4. Heart muscles are not strong
Subtopic: Â Circulatory Pathways |
 94%
Level 1: 80%+
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Single circulation is characteristic of
1. Fish heart
2. Frog heart
3. Crocodilian heart
4. Marsupial heart
Subtopic: Â Circulatory Pathways |
 93%
Level 1: 80%+
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Mixing of oxygenated and deoxygenated blood occurs in the heart of
1. Bird
2. Crocodile
3. Rabbit
4. Frog
1. Bird
2. Crocodile
3. Rabbit
4. Frog
Subtopic: Â Circulatory Pathways |
 86%
Level 1: 80%+
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Consider the two statements:
| Assertion (A): | Open circulatory system is considered to be more advantageous than the closed circulatory system. |
| Reason (R): | Open circulatory system is present in arthropods and molluscs, two of the most successful animal phyla. |
| 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: Â Circulatory Pathways |
 87%
Level 1: 80%+
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How many of the given statements are correct:
| I: | Fishes have a 2-chambered heart with an atrium and a ventricle. |
| II: | Amphibians and the reptiles (except crocodiles) have a 3-chambered heart with two atria and a single ventricle. |
| III: | Crocodiles, birds and mammals possess a 4-chambered heart with two atria and two ventricles. |
| IV: | The only vertebrates where the heart pumps out deoxygenated blood are fishes. |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
Subtopic: Â Circulatory Pathways |
Level 3: 35%-60%
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Match type of blood vascular system in Column I with its characteristic in Column II
1. A-II, B-I, C-IV, D-III
2. A-III, B-IV, C-II, D-I
3. A-I, B-III, C-II, D-IV
4. A-IV, B-II, C-III, D-I
| Column I | Column II | ||
| A | Single circulation | I | Heart to various parts of body |
| B | Open circulation | II | Heart top lungs |
| C | Pulmonary circulation | III | Venous heart |
| D | Systemic circulation | IV | Heamoceol |
2. A-III, B-IV, C-II, D-I
3. A-I, B-III, C-II, D-IV
4. A-IV, B-II, C-III, D-I
Subtopic: Â Circulatory Pathways |
 79%
Level 2: 60%+
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Match List-I with List-II:
Choose the correct answer from the options given below:
1. A-III, B-II, C-IV, D-I
2. A-II, B-III, C-I, D-IV
3. A-IV, B-II, C-I, D-III
4. A-I, B-III, C-IV, D-II
| List-I | List-II | ||
| A. | P wave | I. | Heart muscles are electrically silent |
| B. | QRS complex | II. | Depolarisation of ventricles. |
| C. | T wave | III. | Depolarisation of atria. |
| D. | T-P gap | IV. | Repolarisation of ventricles. |
1. A-III, B-II, C-IV, D-I
2. A-II, B-III, C-I, D-IV
3. A-IV, B-II, C-I, D-III
4. A-I, B-III, C-IV, D-II
Subtopic: Â ECG & Coronary Artery Disease |Â Circulatory Pathways |
 87%
Level 1: 80%+
NEET - 2024
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Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I | List-II | ||
| A. | Tricuspid valves | I. | Guards the opening between right atrium and right ventricle |
| B. | Sino-atrial node | II. | Guards the opening between the left atrium and the left ventricle |
| C. | Mitral valves | III. | Guards the opening of right and left ventricles into pulmonary artery and aorta, respectively |
| D. | Semilunar valves | IV. | Cardiac musculature in the right upper corner of right atrium |
| 1. | A-III, B-IV, C-II, D-I | 2. | A-II, B-I, C-IV, D-III |
| 3. | A-III, B-IV, C-I, D-II | 4. | A-I, B-IV, C-II, D-III |
Subtopic: Â Human Heart: Gross Anatomy |Â Human Heart: Cardiac Cycle |Â Circulatory Pathways |
 84%
Level 1: 80%+
NEET - 2024
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