Question

Calcium is important in the synapse because it

A) is necessary for acetylcholine synthesis.
B) signals the exocytosis of the neurotransmitter.
C) binds to receptors on the postsynaptic cell, opening ion channels, and triggering graded potentials.
D) leaves the axon terminal, hyperpolarizing the cell

Answer 1

B) Signals the exocytosis of the neurotransmitter

Step-by-step explanation:

Calcium ion (Ca2+) channels are critical during the process of neurotransmission; when these channels are blocked, the neurotransmission is inhibited, it happens because the receptors localized in the postsynaptic membrane are not activated

Answer 2

B) signals the exocytosis of the neurotransmitter.

Step-by-step explanation:

The arrival of action potential at the presynatic neuronal membrane caused the influx of Ca+ into the presynaptic neuron, This leads to the migration and fission of acetycholine neurotransmitter contained vesicles to the tips of the presynaptc neurons, and eventual emptying into the synaptic cleft by exocytosis.

Thus it is the influx of Ca+ which stimulated the migration and emptying of the acetycholine neurotransmitters by exocytosis.

The acetycholine binded with the receptors on the post-synaptic neuron for action potential to generate in the post synaptic neuron as IPSP or EPSP