Nissl's granules are characteristically found in

Neurons receive signals through their . . . . . . and send signals to other neurons through their . . . . . . .

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

Four healthy people in their twenties faced injuries resulting in damage and death of a few cells given below. Which of the cells are least likely to be replaced by new cells?

Which of the following statements are correct?
$I$. Dendrites are long fibres with branched distal ends.
$II$. Axons are short fibres which arise from the cell body.
$III$. The cell body of a neuron contains cytoplasm,a nucleus with cell organelles,and Nissl's granules.
$IV$. Dendrites transmit nerve impulses away from the cell body to a synapse.
The correct option is:

Bundles of nerve fibres are enclosed in a sheath called