ch 11

The reticular formation is associated with

wakefulness, posture, and muscle tone.

During this process, influx of ________ cause(s) vesicles in the axon bulb to fuse with the cell membrane, releasing ________.

Ca2+, neurotransmitter

An action potential is a long or rapid release of energy, generated by the sodium-potassium pumps of neurons.

False

During periods of stress or increased activity, the parasympathetic division of the autonomic nervous system predominates; during periods of rest, the sympathetic division of the autonomic nervous system predominates.

False

Which of the following occurs during the absolute refractory period?

The neuron cannot generate an action potential.

A student noticed that every time he smelled a certain perfume in the hallway, it reminded him of his mother. This is due largely to the activity of the limbic system.

True

The absolute refractory period characteristic of neurons is important in ensuring that action potentials travel in only one direction.

True

Oligodendrocytes are similar to Schwann cells in that they

are a type of neuroglial cell.

Axons branch into axon terminals, which have ________ located at the terminal ends.

bulbs

Cells that provide direct protection and physical support to neurons are

neuroglial cells.

Amyotrophic lateral sclerosis (ALS) is a disease that results from nerve damage in the

spinal cord.

The central nervous system is composed of

the brain and spinal cord.