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

Afferent nerve fibres carry impulses from

Dendrites transmit impulses towards the

The myelin sheath is continuous. If the myelin sheath were continuous in a myelinated nerve fiber,what would happen to nerve conduction?

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 $P, Q,$ and $R$ in the given neuron.