Which statement about axons is false?
A) Invertebrates rely on increasing axon diameter to increase conduction speed.
B) In vertebrates, myelination of axons is one way to increase conduction speed.
C) When an axon is myelinated, action potentials can only be fired at the nodes.
D) Voltage-gated ion channels are clustered at the nodes of myelinated axons.
E) Saltatory conduction is fast because ion channels open and close faster than electric current can flow through the cytoplasm.

Question

Quizplus · Accepted Answer

Saltatory conduction is faster not because ion channels open and close faster than electric current can flow through the cytoplasm, but because the action potential jumps from node to node, skipping the myelinated sections of the axon. This allows the action potential to travel much faster than it would if it had to move through every part of the axon membrane.

Which Statement About Axons Is False