In the parasympathetic nervous system,which of the following is released?

The junction of two nerve fibres is called:

What is the difference between electrical transmission and chemical transmission?

$A$ diagram showing an axon terminal and a synapse is given. Identify correctly at least two of $A - D$.

$A$ : Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.
$R$ : Transmission across a synapse usually requires neurotransmitters because there is a small space,$i.e.$,synaptic cleft,that separates one neuron from another.

Synapses store