What is the difference between electrical transmission and chemical transmission?

Explain:
$(1)$ Electrical Synapse
$(2)$ Chemical Synapse

Which of the following neurotransmitters acts as an inhibitory neurotransmitter in the central nervous system?

The parasympathetic nervous system functions through the secretion of which substance?

The venom of a cobra affects the $........$ system.

Five events in the transmission of a nerve impulse across a synapse are given below:
$a.$ Certain ion channels open,allowing ions to enter and generate a new action potential in the post-synaptic neuron.
$b.$ Neurotransmitter molecules bind to receptors on the post-synaptic membrane.
$c.$ Synaptic vesicles fuse with the pre-synaptic membrane,and the neurotransmitter is released into the synaptic cleft. Depolarization of the pre-synaptic membrane is induced.
$d.$ An action potential reaches the axon terminal.
What is the correct sequence of these events?