$A$ nerve impulse is transmitted from one neuron to another through the junctions called

Given below are two statements.
Statement $I$ - In chemical synapse,the rate of transmission of impulse is higher in homeotherms than poikilotherms.
Statement $II$ - In chemical synapse,the synaptic cleft has a width of about $3.8 \ nm$.
In the light of the above statements,select the correct option given below:

New potential generated in the post-synaptic neuron during transmission of impulse is:

What happens if $GABA$ is released at the synapse?

The given diagram shows the axon terminal and synapse. Identify the correct pair of any two labels from $A$ to $D$.

Define/Explain the following terms:
$(1)$ Synapse
$(2)$ Node of Ranvier