Chapter 2

Large nerve cell bodies are about _______ in diameter.

100 μm

The _______ lobe is the most anterior portion of the cerebral cortex.

frontal

The vast majority of neurons in the brain are classified as

interneurons.

A group of axons traveling together within the brain is called a

tract.

The peripheral nervous system has _______ component(s).

two

Which statement about neurons is true?

All neurons have the same four functional zones.

Which of the following is in the correct order of size, from largest to smallest?

An axon terminal; a synaptic cleft; the thickness of the neuronal membrane; the diameter of an ion channel

Which glial cells interact with blood vessels?

Astrocytes

Which imaging technique uses a label that is taken up by axon terminals and then transported back to the cell body?

Retrograde labeling

Horseradish peroxidase (HRP) is a molecule that can be taken up by axon terminals and then carried back to the cell body for visualization of the neuron. Dysfunction in which cellular process would prevent cell labeling by HRP?

Retrograde transport

Which structure does not contain any cell bodies located in the reticular formation?

Telencephalon

The _______ is particularly implicated in odor perception.

amygdala

The gaps between segments of myelin are known as

nodes of Ranvier.

An individual finds themselves in a situation that requires a fight-or-flight response, leading to an accelerated heartrate. Which neurotransmitter is directly responsible for the increased cardiac muscle activity?

norepinephrine

Axon terminals

synapse onto other cells.