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.
I believe the answer is c
Create a hypothesis read more information then see if her answer was correct
Answer:
Primase
Explanation:
Primer needed to initiate DNA replication is PRIMASE.
It aids replication by ensuring that a short stretch of nucleic acid are usually complementary to the template which aids the process.
It also helps to provides and make readily available the 3' end for DNA polymerase to work on during the process of replication
D. Bacteria because “bacteria” is actually a domain itself
