1. Action potential reaches the axon terminal and depolarizes it.
2. Depolarization opens voltage-gated calcium channels, enabling influx of Ca into the neuron.
3. Calcium binds to specialized proteins on vesicles (containing pre-made acetylcholine) and triggers them to fuse with the neuron membrane at the synapse.
4. Exocytosis of acetylcholine into the synaptic cleft occurs.
5. Acetylcholine diffuses across the synapse and binds to nicotinic receptors on the end plate of the myocyte.
6. Activated nicotinic receptors, themselves ion channels, cause cation influx into the myocyte and generate an end plate potential. This eventually gives rise to the full depolarization within the myocyte that enables contraction.
Invasive species cause harm to wildlife in many ways. When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. ... Invasive species can change the food web in an ecosystem by destroying or replacing native food sources.
hope this helps :)
The original six frigates of the United States Navy<span> came up with the Naval Act of 1794. Two<span> characteristics are distinct of these said early US. Navy "super frigates. They are: </span></span>
<span>· </span><span>timbers put close together to be able to withstand heavy cannon fire</span>
<span>· </span><span>hull reinforced to resist the pressures of heavier ordnance on deck</span>
