The junction between two adjacent Schwann cells in a myelinated nerve fiber is known as:

On nerve fibres,to prevent the leakage of an impulse,a layer of ...... is found.

Select the correct option for dendrites and axons.
$I -$ Short fibers,$II -$ Long fibers,$III -$ Transmit impulses away from the cell body,$IV -$ Transmit impulses towards the cell body,$V -$ Highly branched fibers,$VI -$ Unbranched fibers
Dendrites $\quad$ $\quad$ Axon

Match List $- I$ with List $- II$:

List $- I$	List $- II$
$a$. Multipolar neuron	$i$. Somatic neural system
$b$. Bipolar neuron	$ii$. Cerebral cortex
$c$. Myelinated nerve fibre	$iii$. Retina of eye
$d$. Unmyelinated nerve fibre	$iv$. Spinal nerves

Choose the correct answer from the options given below:

Define the location and function of the following:
$(1)$ Nerve net
$(2)$ Dendrites

Which of the following structures distinguishes a neuron from other cells?