Brain and Behavior Quiz 1

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____ in the brain and spinal cord and ____ in the periphery are specialized types of glia that build the myelin sheaths that surround neurons.​

Oligodendrocytes; Schwann cells

The resting potential of a neuron refers to the ____.​

net negative charge on the inside of the neuron

The two basic kinds of cells in the nervous system are _____.​

neurons and glia

According to the all-or-none law, ____.

once an axon reaches threshold, the amplitude and velocity of an action potential are nearly equal each time

A membrane produces an action potential whenever the potential across it reaches what level?

the threshold of excitation

Which type of glia remove waste material in the nervous system?​

​astrocytes

Neurons typically have one ____, but many ____.​

​axon; dendrites

The tree-like branches of a neuron that receive information from other neurons are called _____.​

​dendrites

The function of a myelin sheath is to ____.​

​increase the velocity of transmission along an axon

When the potential across a membrane reaches threshold, the sodium channels ____.

​open to let sodium enter the cell rapidly


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