NAFTA

question 61

Multiple Choice

NAFTA:

• A) is a free-trade pact between the U.S., Canada, and Mexico.
• B) is a long-term proposition.
• C) has eliminated most trade barriers with Mexico in the past 15 years.
• D) all of the above.
• E) none of the above.

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Definitions:

First Messenger

A signaling molecule that binds to a receptor on the surface of a cell and triggers a series of intracellular processes.

G Protein

Guanyl nucleotide–binding protein coupled to a metabotropic receptor; when activated, binds to other proteins.

Neurotransmitter

Chemicals released by neurons that transmit signals across a synapse from one neuron to another target neuron, muscle cell, or gland cell.

Activating Systems

Networks within the brain that are responsible for arousal, wakefulness, and the regulation of attention.