Identify the labelled parts $A, B$ and $C$ from the given diagram.

In the parasympathetic nervous system,which of the following acts as the neurotransmitter?

Which of the following statements are correct regarding electrical synapses?
$i.$ At electrical synapses,the membranes of pre- and post-synaptic neurons are in very close proximity.
$ii.$ Electrical current can flow directly from one neuron into the other across these synapses.
$iii.$ Impulse transmission across an electrical synapse is very similar to impulse conduction along a single axon.
$iv.$ Electrical synapses transmit signals using neurotransmitters like acetylcholine.
$v.$ Electrical synapse transmission is very fast.
$vi.$ Electrical synapses are rare in our system.

How is the synaptic cleft formed?

Which of the following does not act as a neurotransmitter?

How are nerve impulses transmitted across a synapse?