In a chemical synapse,the transmission of nerve impulses is mediated by:

Select the incorrect statement regarding synapses :

Which of the following substances leads to the inhibition of the central nervous 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?

Which of the following inhibits the enzyme acetylcholinesterase?

Axon terminal is indicated by which alphabet in the given figure?