Factors That Might Influence Recent Changes in the Age at Which

question 84

Multiple Choice

Factors that might influence recent changes in the age at which puberty begins include

• A) exposure to cultural factors such as television.
• B) obesity and exposure to synthetic hormones.
• C) a cultural tendency to marry later.
• D) reduced access to good health care.

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Definitions:

Antibody

A protein produced by the immune system that recognizes and binds to specific foreign substances (antigens) to help fight off infections.

Antigens

Substances that induce an immune response in the body, especially the production of antibodies.

Radioimmunoassay

A sensitive technique used in biochemistry to measure concentrations of antigens by the use of antibodies.

False Positive

A test result which wrongly indicates the presence of a condition or characteristic.