The Income Distribution in the United States Shows That the Income

question 363

Multiple Choice

The income distribution in the United States shows that the income share of the top fifth of all families is

• A) over 50 percent.
• B) around 25 percent.
• C) more than 10 times the income of the bottom fifth.
• D) not much different from the income of the top 5 percent.

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Definitions:

Neurotransmitters

Chemical substances in the nervous system that transmit signals from one neuron to another across synapses.

Terminal Buttons

The small knobs at the end of an axon that release chemicals known as neurotransmitters, which transmit signals to other neurons.

Myelin Sheath

A fatty layer that surrounds the axons of some neurons, providing insulation and improving the speed and efficiency of neural signal transmission.

Dendrites

Branch-like extensions of neurons that receive signals from other neurons and conduct them toward the cell body.