Compared with Previous Years,the Percentage of Single-Parent Families Has ______

question 8

Multiple Choice

Compared with previous years,the percentage of single-parent families has ______ and the percentage of two-parent families has ______.

• A)increased; increased
• B)decreased; decreased
• C)decreased; increased
• D)increased; decreased

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Definitions:

Nicotine

A stimulating and addictive substance found in tobacco products.

Agonist

A chemical or drug that binds to receptors in the brain and causes a reaction similar to that of a naturally occurring neurotransmitter.

Excitatory Signal

A type of neurotransmitter-induced signal in the nervous system that increases the likelihood of a neuron firing an action potential.

Action Potential

A sudden increase and subsequent decrease in the voltage across a cell membrane resulting from the movement of charged particles.