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What does myelin do to a signal?

Insulates the axon so it jumps node to node — much faster.

Nodes of Ranvier are…

The unmyelinated gaps where the signal regenerates.

Resting membrane potential?

About −70 mV.

Glia outnumber neurons by roughly…

About 1:1 in the human brain — the 10:1 figure is a myth.

Saltatory conduction means…

The action potential leaps between nodes instead of creeping.

pdf12 pp

Exam 2 Study Guide
PSY 101 · neurons & signalling

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PHI 101 · card 7 of 14

In the trolley problem, what does the utilitarian answer rest on?

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What does myelin do to a signal travelling down a neuron?

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