Ventricles of the brain are lined by cells called:

Nissl's granules are absent in

Select the incorrect pair:

Which of the following parts of a neuron is covered by a fatty sheath?

Choose the incorrect statement.

Choose the correct statements about Nissl's granules from the codes given below:
$I.$ There are regular masses of ribosomes
$II.$ There are irregular masses of ribosomes and $ER$
$III.$ There are granular bodies
$IV.$ They synthesise proteins in the cell