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The Proportion of the Population of the United States Age

question 78

Multiple Choice

The proportion of the population of the United States age 65 and older should peak in what year?


Definitions:

Buccinator

A muscle of the cheek that compresses the cheek against the teeth and aids in chewing.

Orbicularis Oculi

A circular muscle around the orbit of the eye that allows the eyes to close, blink, and squint.

Masseter

The masseter muscle is a facial muscle that plays a key role in mastication (chewing) by elevating the mandible (lower jaw).

Zygomaticus Major

A muscle of facial expression that draws the angle of the mouth superiorly and posteriorly.

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