Question

1.) Refractory periods of nerve conduction results in:

a.) the cardiac muscle being autorhythmic

b.) nerve conduction traveling in one direction

c.) blood flowing in one direction

d.) none of above

Along a myelinated axon, the electrical nerve impulse appears to jump between the nodes of Ranvier. This is called:

a.) internode conduction

b.) saltatory conduction

c.) facilitatory conduction

d.) a & c above

The regeneration tube is:

a.) the embryonic tissue related to the formation of the mature brain

b.) comprised of the neurilemma, schwann cells, and basil lamina and responsible for axon repair

c.) deals with the replacement of the soma

d.) a term given to describe synthesis of new neurotransmitters in the axoplasm.

TRUE OR FALSE

The greater the diameter of a myelinated nerve fiber, the faster the nerve impulse. - T or F

Schwann cells are responsible for axonal myelination in the CNS. - T or F

The peripheral nervous system contain nuclei. - T or F

The trigger zone is where action potentials are initiated that are carried by the axon. - T or F

Anterograde axonal transport is movement of protein products synthesized by the soma to the axon and its terminal branches. - T or F

Answer 1

Question no 1 is Option d none of the above

As option 1 is wrong as autorythmicity occur due to the atrio ventricular node and sinoatrial node that has ability to activate the cells and produce impulse by its own . This has no connection to refractory period

Option b is wrong as refractory period has no connection in flow of conducting in one direction

Option c is wrong as there is no connection with blood flow

Refractory period is the time for the cell to reduce its increasingly negative charge inside and become active . It is like a rest period