Sort the step happening during the excitation phase of muscle contraction Start

Question

Sort the step happening during the excitation phase of muscle contraction Start with axon potential reaches a terminal axon of the motor neuron the opening of ligand-gated channel leads to the creation of end-plate- potential (rapid fluctuation in membrane voltage of the sarcolemma at the neuromuscular junction) 10. calcium is released from terminal cisternae (sarcoplasmic reticulum) Ca++ enter synaptic knob Acetylcholine (Ach) binds to ligand-gated channel a wave of action potential spreads throughout the sarcolemma Action potential reaches axon terminal of motor neuron Ca++ voltage-gated channel open up Question 7 of 25> Moving to the next question prevents changes to this answer Synaptic vesicles release acetylcholine (Ach) into synaptic cleft Calcium binds to troponin; and tropomyosin exposes binding sites of actin for myosin action potentials reach the T-tubules and propagate down the tubules

Explanation / Answer

1. Action potential reached a axon terminal of motor neuron.

2. Synaptic vesicles release acetylcholine into synaptic cleft.

3. Acetylcholine binds to ligand gated channels.

4. The opening of ligand gated channel leads to the creation of end plate potential.

5. A wave of action potential spreads throughout the sarcolemma.

6. Action potential reached the T tubules and propagates down the tubules.

7. Calcium is released from the terminal Cisternae.

8. Ca++ enter the synaptic knob.

9.Ca++ voltage gated channels open up.

10. Calcium binds to troponin and tropomyosin exposes binding sites of action for myosin.

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