Dendron || Axon || Myelinogenesis

Dendrites and Axons

Area of coming together of two neuron ends or between a dendron and axon ends is

Assertion (A): White matter of brain and spinal cord comprises axons. Reason (R): Axon of a neuron is coated with myelin sheath.

Assertion :- Neuron is the longest cell of human body. Reason:- It contain dendrites and axon.

When a stimulus is applied on axonal membrane then generation of action potential is due to

Assertion : Myelinated nerve fibre are enveloped with Schwan cells, which form a myelin sheath around the axon Reason : Unmyelinated nerve fibre is not enclosed by a Schwan cell and hence does not form a myelin sheath around the axon.

Why conduction of nerve impulse across the synapse is always unidirectional from axon to dendron?

Function of axon is to

Suppose the terminal ends of axon are in contact with dendrites of four adjacent neurons , the nerve impulse of the axon will