Place a checkmark next to each event that would lead to the formation of an actin-myosin cross-bridge. List of Events Release of acetylcholine from the motor neuron into the synaptic cleft at the neuromuscular junction Depolarization of the muscle fiber Impairing the release of calcium from the sarcoplasmic reticulum A conformational change in troponin Answer Bank ?
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Place the following events in chronological order: 1. Action potential in the alpha motor neuron 2. Calcium increase in alpha motor neuron 3. Acetylcholine release 4. Activation of nicotinic Acetylcholine receptors 5. Depolarization of muscle endplate 6. Sacrolemma action potential 7. Activation of DHP receptor 8. Activation of ryanodine receptor 9. Calcium increase in muscle cell 10. Depolarization of t-tubule
Adi S.
Events at Neuromuscular Junction In chronological order, the events that occur at a neuromuscular junction are as follows: 1. Acetylcholine diffuses across the synaptic cleft. 2. Some vesicles release acetylcholine, increasing the permeability of the membrane to sodium and opening sodium channels. 3. Acetylcholine binds to receptors on the motor end plate. 4. A nerve impulse is triggered and travels along the sarcolemma. 5. The nerve impulse arrives at the distal end of the motor neuron axon.
Madhur L.
Rank the sequence of events at the NMJ that initiate an action potential in the muscle fiber, from first to last. - Action potential arrives at the axon terminal. - Acetylcholine binds to its receptors on the junctional folds. - Calcium ions enter the axon terminal. - Synaptic vesicles fuse to membrane of axon terminal. - Junctional folds become depolarized. - Action potential is initiated on the sarcolemma. - Acetylcholine is released into the synaptic cleft.
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