Nervous tissue cells that play several supporting roles but do not transmit impulses are called

Nissl's granules in a nerve cell are composed of which of the following,which are currently known as $..........$?

Four healthy individuals suffer an injury at the age of $20$ years,which results in the damage and death of some cells. Which of the following cells will show the least amount of regeneration?

Myelin sheath is a layer covering

The neurilemma surrounds the

Where are $Nissl$ granules found?