Why Does Population Aging Occur

question 49

Multiple Choice

Why does population aging occur?

• A) Fertility and mortality rates increase at the same time.
• B) Fertility and mortality rates decline at the same time.
• C) Entitlements lead to an increase in the proportion of aged.
• D) Better sanitation leads to a decreased elderly dependency ratio.

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Definitions:

Recognizing Faces

The cognitive process by which the brain identifies and understands the faces of individuals.

Opponent-Process Theory

A theory that explains how the perception of one color (e.g., red) can inhibit the perception of another color (e.g., green).

Feature Detectors

Nerve cells in the brain that respond to specific features of a stimulus, such as edges, lines, or movements.

Hubel and Wiesel

Neurophysiologists who made pioneering discoveries concerning the visual system's neural pathways and functional organization in the brain.