Afferent nerve fibers transmit impulses from:

Mark the following statements as true/false and choose the correct option from the codes given below:
$I.$ Neuroglial cells are the packing and supporting cells found in the brain and spinal cord.
$II.$ Oligodendrocytes are a category of glial cells that form myelin sheaths around the axon.
$III.$ Microglia provide mechanical support to the neurons.
$IV.$ Astrocytes communicate with one another through potassium channels.

Identify $X$ and $Y$ in the given figure.

In polio,the legs become paralyzed and useless. What is the reason for this?

Match the following columns:

Column-$I$	Column-$II$
$P$. Unipolar neuron	$I$. Embryonic stage
$Q$. Bipolar neuron	$II$. Cerebral cortex
$R$. Multipolar neuron	$III$. Retina of eye

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