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  • 1(current)
Q. No.

Sliding filament theory can be best explained as

1. when myofilaments slide pass each other actin filaments shorten while myosin filament do not shorten
2. actin and myosin filaments shorten and slide pass each other
3. actin and myosin filaments do not shorten but rather slide pass each other
4. when myofilament slide pass each other myosin filament shorten while actin filaments do not shorten
Subtopic:  Sliding Filament Theory |
From NCERT
NEET - 2015
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What are the sequential steps in the formation and breakage of a cross-bridge in muscle contraction?
1. Myosin head hydrolyzes ATP, attaches to actin, performs a power stroke, and releases ADP.
2. Myosin head binds to ATP, detaches from actin, hydrolyzes ATP, and reattaches to actin.
3. Myosin head releases ADP, binds to ATP, detaches from actin, and hydrolyzes ATP.
4. Myosin head attaches to actin, performs a power stroke, binds ATP, and then detaches from actin.
Subtopic:  Sliding Filament Theory |
From NCERT
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Calcium released into the sarcoplasm during muscle contraction:
1. binds to the actin and myosin and makes them work together.
2. breaks apart ATP to ADP and P.
3. removes the tropomyosin block.
4. causes the release of acetylcholine.
Subtopic:  Sliding Filament Theory |
 61%
From NCERT
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A motor unit is composed of:
1. a motor neuron and all of the skeletal muscle fibers innervated by the neuron's axon terminals.
2. all motor neurons and all of the skeletal muscle fibers innervated by them in a muscle.
3. a motor neuron and one skeletal muscle fiber innervated by the neuron.
4. a motor neuron and a sensory neuron.
Subtopic:  Sliding Filament Theory | Muscle Contraction: Other Considerations |
 56%
From NCERT
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Consider the given two statements regarding the cycle of events taking place during skeletal muscle contraction:
Statement I: The myosin, hydrolysing ATP into ADP and Pi goes back to its relaxed state.
Statement II: Cross bridge is broken when myosin releases ADP and Pi.

1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic:  Sliding Filament Theory | Energy for Muscle Contraction |
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Sliding filament theory can be best explained as:

1. when myofilaments slide past each other, actin filaments shorten while myosin filament does not shorten
2. actin and myosin filaments shorten and slide past each other
3. actin and myosin filaments do not shorten but rather slide pass each other
4. when myofilaments slide past each other, myosin filaments shorten while actin filaments do not shorten
Subtopic:  Sliding Filament Theory |
 52%
From NCERT
NEET - 2015
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
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Which of the following is required for the breaking of cross-bridge during muscle contraction?

1. ATP and Ca++

2.  ADP and Ca++

3.  Only Ca++

4.  ATP only

Subtopic:  Sliding Filament Theory |
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
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