Which of the following is considered the structural and functional unit of neural tissue?

Where are Nissl's granules present?

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

Which cell in our body is longer than one foot?

The Nissl's granules are present in:

Nissl's granules in a neuron are composed of ........