Myelinated and Unmyelinated Fibres

Q. The velocity of action potential propagation

1. Is independent of an axon's diameter
2. Depends on the thickness of the myelin around the axon
3. Will be unaffected if the axon becomes demyelinated
4. Is fastest in non-myelinated axons.

Q. Where can you find nodes of Ranvier?

1. on an axon
2. in the cell body
3. on a dendrite
4. both a and c

Q.

Cells of Schwann are associated with

1. Cartilage tissue

2. Nervous tissue

3. Connective tissue

4. Cardiac muscle

5. Skeleton muscle

Q. In the central nervous system, myelinated parts of the neuron form the ___, while the non-myelinated parts of the cells form the ___.

1. Grey matter, white matter
2. White matter, grey matter
3. Yellow matter, white matter
4. Red matter, yellow matter

Q.

what is action potential

Q.

which cell shows the longest period of g0 phase during cell division in human body?

Q. The myelin sheath around axon is formed by:

1. Nodes of ranvier
2. Synaptic knob
3. Schwann cells
4. Both b and c

Q.

Why conduction of nerve is faster in myelinated nerve fibre