By the End of High School, About How Many of American

question 143

Multiple Choice

By the end of high school, about how many of American adolescents will have had sexual intercourse?

• A) one-quarter
• B) one-third
• C) one-half
• D) two-thirds

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Definitions:

Secondary Defense

Adaptive mechanisms that are triggered if primary defense mechanisms (such as the skin and mucous membranes) fail, involving processes like inflammation and phagocytosis.

Airborne Isolation

A set of infection control precautions used to prevent diseases that are spread through air droplets from being transmitted.

White Blood Cell Count

A measurement of the number of white blood cells in a volume of blood, used to detect infections or immune system disorders.

Protective Precaution

Measures taken to protect individuals, especially vulnerable populations, from harm or injury.