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Q. No.Assertion (A): Myasthenia Gravis is an autoimmune disorder.
Reason (R): Antibodies produced in the body start attacking its own receptors present on sarcolemma.
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: Disorders of Muscular and Skeletal System |
85%
From NCERT
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Assertion (A): The articulation between the occipital condyles and atlas vertebra forms a hinge joint.
Reason (R): This allows the head to move in one plane.
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
Reason (R): This allows the head to move in one plane.
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: Synovial Joint |
71%
From NCERT
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Assertion (A): The inflammation of joints can immobilize the movement.
Reason (R): Immobility is caused to accumulation of uric acid crystals and ossification of articular cartilage.
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
Reason (R): Immobility is caused to accumulation of uric acid crystals and ossification of articular cartilage.
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: Disorders of Muscular and Skeletal System |
76%
From NCERT
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Assertion (A): Deltoid rigde is found in humerus.
Reason (R): Obturator foramen is enclosed between ischium and pubis.
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
Reason (R): Obturator foramen is enclosed between ischium and pubis.
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: Appendicular Skeleton |
68%
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Assertion (A): A human rib cage contain two floating ribs as a whole.
Reason (R): Floating ribs are not attached with vertebrae.
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
Reason (R): Floating ribs are not attached with vertebrae.
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: Sternum & Ribs | Axial Skeleton |
62%
From NCERT
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Assertion (A): A sprain is the twisting of a joint without dislocating it.
Reason (R) A strain is a less severe stretching or twisting of the joint.
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
Reason (R) A strain is a less severe stretching or twisting of the joint.
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: Disorders of Muscular and Skeletal System |
65%
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What is the role of acetylcholine in muscle contraction?
1. It is used to link nerve pulse with receptors in the muscle.
2. It makes upper part of the muscle fibres degenerate
3. The myosin heads use acetylcholine to bind to action filaments
4. It maintains contraction of a muscle in a manner similar to a brake
1. It is used to link nerve pulse with receptors in the muscle.
2. It makes upper part of the muscle fibres degenerate
3. The myosin heads use acetylcholine to bind to action filaments
4. It maintains contraction of a muscle in a manner similar to a brake
Subtopic: Excitation Contraction Coupling I |
68%
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Rigor mortis (stiffness after death) occurs due to muscle contraction. However, it lasts for 24 hours and then disappears. This is because:
1. The body looses rigidity due to decay of muscle protein
2. Proteolytic enzymes get deactivated
3. Ca2+ channels in the sarcoplasmic reticulum are closed after 24 hours
4. Cross-linkages between myosin and actin gets reformed
1. The body looses rigidity due to decay of muscle protein
2. Proteolytic enzymes get deactivated
3. Ca2+ channels in the sarcoplasmic reticulum are closed after 24 hours
4. Cross-linkages between myosin and actin gets reformed
Subtopic: Energy for Muscle Contraction | Muscle Contraction: Other Considerations |
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Identify A, B, C and D from the table:
| Red muscle fibre | White muscle fibre |
| These are dark red | These are lighet in colour |
| Mitochondria is more in number. | Mitochondria is less in number. |
| A | B |
| These carry out mainly aerobic oxidation and can contract for a longer period without fatigue. | These carry out mainly anaerobic oxidation and can get fatigued soon. |
| C | D |
| Optons | A | B | C | D |
| 1. | More sarcoplasmic reticulum | Less sarcoplasmic reticulum | Muscle fibres have slow rate of contraction for long periods | Muscle fibres have fast rate of contraction for long periods |
| 2. | Less sarcoplasmic reticulum | More sarcoplasmic reticulum | Muscle fibres have slow rate of contraction for long periods | Muscle fibres have fast rate of contraction for long periods |
| 3. | Less sarcoplasmic reticulum | More sarcoplasmic reticulum | Muscle fibres have fast rate of contraction for long periods | Muscle fibres have slow rate of contraction for long periods |
| 4. | Less sarcoplasmic reticulum | less sarcoplasmic reticulum | Muscle fibres have fast rate of contraction for long periods | Muscle fibres have fast rate of contraction for long periods |
Subtopic: Skeletal Muscle: Basic Anatomy |
62%
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Read the following statements and choose the correct option:
A. The extensor muscles of human back reamin in sustained contraction to maintain erect posture against gravity.
B. The extensor mucles are rich red muscle fibres with abundant mitochondria and myoglobin.
1. Statement A is correct but B incorrect.
2. Statement B correct but A incorrect.
3. Statement A is correct and B are correct but B is not hte correct explanation of A.
4. Both the statements A and B are correct but B is not the correct explanation of A.
A. The extensor muscles of human back reamin in sustained contraction to maintain erect posture against gravity.
B. The extensor mucles are rich red muscle fibres with abundant mitochondria and myoglobin.
1. Statement A is correct but B incorrect.
2. Statement B correct but A incorrect.
3. Statement A is correct and B are correct but B is not hte correct explanation of A.
4. Both the statements A and B are correct but B is not the correct explanation of A.
Subtopic: Skeletal Muscle: Basic Anatomy |
54%
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