Which of the following options shows the correct order of stages in muscle contraction from the initiation to the formation of a cross bridge?
1
CNS sends signal → Neurotransmitter (Acetylcholine) release → Motor unit formation → Action potential generated in sarcolemma → Increase in Ca++ level → Troponin binding to Ca++ → ATP hydrolysis → Cross bridge formation
2
CNS sends signal → Action potential generated in sarcolemma → Motor-end plate activation → Neurotransmitter (Acetylcholine) release → Increase in Ca++ level → Troponin binding to Ca++ → Masking of active sites on actin → Cross bridge formation
3
CNS sends signal → Neurotransmitter (Acetylcholine) release → Action potential generated in sarcolemma → Increase in Ca++ level → Troponin binding to Ca++ → Masking of active sites on myosin → Cross bridge formation
4
CNS sends signal → Neurotransmitter (Acetylcholine) release → Action potential generated in sarcolemma → Increase in Ca++ level → Troponin binding to Ca++ → Removal of masking of active sites on actin → ATP hydrolysis → Cross bridge formation