The venom of a cobra primarily affects the:

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

Alzheimer's disease in humans is associated with the deficiency of

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?

The following figure shows the structure of a neuron. Which of the following parts contains neurotransmitters?

Which one of the following statements regarding nerve activity is true?