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Q. No.Consider the following statements with respect to mechanism of muscle contraction
(a)
Binding of calcium with the subunit of tropomyosin removes the masking of active sites for myosin
(b)
Z-lines move towards the centre of ‘H’ zone
(c)
Cross bridge is formed by utilising the energy from hydrolysis of ATP
(d)
H-zone disappears when a muscle fibre is maximally contracted
Select the option with the correct statement
1. a and c only
2. b and d only
3. a, c and d
4. b, c and d
Subtopic: Sliding Filament Theory |
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Assertion (A): A sarcomere consists of one 'A-band' and two half 'I-band'.
Reason (R): The sheath covering the bundle of muscle fibre is called fascia.
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): The sheath covering the bundle of muscle fibre is called fascia.
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: Skeletal Muscle: Basic Anatomy |
74%
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Assertion (A): The sheath covering the bundle of muscle fibre is called perimysium.
Reason (R): Perimysium is a sheath of connective tissue.
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): Perimysium is a sheath of connective tissue.
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: Skeletal Muscle: Basic Anatomy |
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Assertion (A): Cori-cycle prevents lactic acidosis in muscles under anaerobic condition.
Reason (R): Cori-cycle converts lactic acid of muscles into glucose in liver.
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): Cori-cycle converts lactic acid of muscles into glucose in liver.
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: Energy for Muscle Contraction | Muscle Contraction: Other Considerations |
62%
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Assertion (A): Phalangeal formula for human hand is 2 2 3 3 3.
Reason (R): Phalangeal parts depends on the number of tarsals.
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): Phalangeal parts depends on the number of tarsals.
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 |
79%
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Assertion (A): The dark band on myofibril is anisotropic band.
Reason (R): The light band on myofibril is isotropic band.
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): The light band on myofibril is isotropic band.
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: Skeletal Muscle: Myofilaments | Skeletal Muscle: Sarcomere |
89%
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Assertion (A): Myosin is not a part of thin filament.
Reason (R): Meromyosin polymerises to form myosin.
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): Meromyosin polymerises to form myosin.
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: Skeletal Muscle: Myofilaments |
82%
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Assertion (A) The mechanism of muscle contraction can be explained by sliding-filament theory.
Reason (R): Muscular contraction occurs by the sliding of thick filaments over the thin filaments.
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): Muscular contraction occurs by the sliding of thick filaments over the thin filaments.
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: Sliding Filament Theory |
80%
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Assertion (A): The human skull is dicondylic.
Reason (R) The human skull articulates with superior region of the vertebral column with the hald of two occipetal condyles.
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) The human skull articulates with superior region of the vertebral column with the hald of two occipetal condyles.
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: Axial Skeleton |
86%
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Assertion (A): Fibrous joints play a major role in locomotory processes.
Reason (R): Fibrous joint possess synovial fluid.
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): Fibrous joint possess synovial fluid.
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: Fibrous & Catilaginous Joints |
85%
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