Question

Fill in the blanks. Choose the appropriate word or words from the brackets and fill up the blanks:

(d) ______ increases the speed of impulse along an axon. (Myelin sheath/ Synapse).

Answer 1

Myelinated axon:

1. Axon is one of the parts of the neuron that carries the impulse away from the cell body.
2. From the outside, the axon is covered by three layers: neurolemma, myelin sheath, and axolemma.
3. The parts of the axon which does not have the myelin sheath is called the 'Nodes of Ranveir'
4. The pace of the impulse increases as it goes down the sheath, jumping from one node to the next.

Final Answer: Myelin sheath increases the speed of impulse along an axon.