- 1(current)
Q. No.Blood pumped by the heart is always circulated through a closed network of blood vessels in:
a. arthropods
b. molluscs
c. annelids
d. chordates
1. Only a and b
2. Only c and d
3. Only a and c
4. Only b and d
a. arthropods
b. molluscs
c. annelids
d. chordates
1. Only a and b
2. Only c and d
3. Only a and c
4. Only b and d
Subtopic: Circulatory Pathways |
82%
From NCERT
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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: Circulatory Pathways |
87%
From NCERT
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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: Circulatory Pathways |
From NCERT
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Identify the correct statements:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | Humans have a closed circulatory system. |
| II: | Arthropods have an open circulatory system. |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Circulatory Pathways |
91%
From NCERT
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Consider the given two statements:
| Assertion (A): | Double circulation includes the passage of blood through the heart twice during one complete cycle |
| Reason (R): | Double circulation is seen in birds and mammals. |
| 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. |
Subtopic: Circulatory Pathways |
81%
From NCERT
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Consider the two statements:
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
| Statement I: | A muscular wall called a septum prevents the mixture of blood between the left and right sides of the heart. |
| Statement II: | The left ventricle has a thicker musculature when compared to the musculature of the right ventricle. |
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
Subtopic: Human Heart: Gross Anatomy | Human Heart: Cardiac Cycle | Circulatory Pathways |
77%
From NCERT
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Identify the correct chronological arrangement of the components of the cardiac conduction nodal tissue:
| 1. | SA node, AV bundle, AV node, Purkinje fibers |
| 2. | SA node, AV node, AV bundle, Purkinje fibers |
| 3. | AV node, AV bundle, SA node, Purkinje fibers |
| 4. | AV node, SA node, Purkinje fibers, AV bundle |
Subtopic: Human Heart: Gross Anatomy | Human Heart: Cardiac Cycle | Rhythmic Excitation of Human Heart: Part 1 | Rhythmic Excitation of Human Heart: Part 2 | Circulatory Pathways |
94%
From NCERT
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Subtopic: Circulatory Pathways |
92%
From NCERT
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