Sliding filament theory of muscle contraction

2 Questions
2 Papers Covered
11.11% Weightage
Start Practice → Browse Questions

All Questions

2026 1 question

  1. Choose the correct statements regarding muscle contraction. I. A motor neuron carries a signal sent by the Central Nervous System (CNS) to the sarcolemma of the muscle fibre. II. The neural signal generates an action potential which causes the release of $Ca^{++}$ into sarcoplasm. III. Increase in $Ca^{++}$ inactivates the actin for breaking cross bridges. IV. Actin binds to the myosin head to form a cross bridge. V. Shortening of sarcomere takes place by pulling actin filaments towards the centre of 'A' band. Choose the CORRECT answer from the options given below:

2024 Re-NEET 1 question

  1. Select the correct statements regarding mechanism of muscle contraction. A. It is initiated by a signal sent by CNS via sensory neuron. B. Neurotransmitter generates action potential in the sarcolemma. C. Increased $Ca^{++}$ level leads to the binding of calcium with troponin on action filaments. D. Masking of active site for actin is activated. E. Utilising the energy from ATP hydrolysis to form cross bridge. Choose the most appropriate answer from the options given below: