Which of the following is an important advantage associated with saltatory conduction?
a. More sodium ions have to be pumped out of the cell after an action potential.
b. Myelin allows the nerve cell to recycle neurotransmitter molecules.
c. Less transmitter is required to send a message across the next synapse.
d. Myelin speeds up the velocity at which an axon can conduct an action potential.
e. Myelin requires that nerve cell axons be larger in order to conduct a signal rapidly.
Question 2
Saltatory conduction is rapid because
a. cable properties carry the signal under the myelin sheath.
b. myelinated cells have more leakage through the membrane.
c. myelinated axons are larger in diameter.
d. myelinated cells have more ion channels per unit area than do non-myelinated cells.
e. myelinated fibers have a lower threshold of activation.
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