Nissl's granules are found in

The dorsal root ganglion is:

In a neuron,ion channels are made of $.....P....$ and are located in $.....Q.....$.
$\quad\quad P\quad\quad Q$

In the diagram of a multipolar myelinated neuron given below,different parts have been indicated by alphabets. Choose the option in which these alphabets have been correctly matched with the parts they indicate.

Which of the following is the structural and functional unit of the nervous system?

Analogy type question:
$(1)$ Myelinated nerve fiber is covered by Schwann cells : The gap between two adjacent myelin sheaths : .......
$(2)$ Multipolar neuron : One axon and two or more dendrites :: Bipolar neuron : ..........