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The amplitude of a sound wave is related to our perception of __________.

On a hike through the hills, Tony feels a bug crawling up his leg under his pants. Which system is necessary for Tony to be aware of the bug?

Neurons speak to one another or in some cases to muscles or glands, in a(n) __________.

When you first climb into bed, close your eyes, and relax, your brain emits bursts of __________.

__________ is a measure of the smallest amount of energy a person can reliably detect.

The color or hue that we perceive is related to the __________.

A __________ is a substance that alters perception, mood, thinking, or behavior by interacting with the biochemistry of the brain and body.

__________ are the short bursts of rapid, high-peaking waves that the brain emits in the second stage of the sleep cycle.

The number of enslaved people in the colonies was less than 20,000 in 1770.

Puritans derived their theology primarily from which system of Christian thought?