Which of the following scenarios will lead to muscle contraction?
1. A drug that inhibits acetylcholine receptors
2. A sustained increase in the release of calcium into the sarcoplasm of muscle cells
3. Depletion of ATP in the sarcoplasm of muscle cells
4. Calcium channels in sarcoplasmic reticulum are inhibited
5. Calcium pumps in the sarcoplasmic reticulum are inhibited.
6. Neurons fail to send an action potential
7. Calcium channels in the motor neuron fail. 8. Sustained release of acetylcholine into the synaptic cleft.
9. Defects in troponin interfere with calcium binding.
10. General lack of calcium in the body