Caleb Is Four Months Old

question 68

Multiple Choice

Caleb is four months old. If he is like others his age, when he grasps a rattle, he will grasp it with

• A)his fingers and thumb.
• B)his thumb only.
• C)his fingers only.
• D)one finger from each hand.

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Definitions:

Skin

The body's largest organ, serving as a protective barrier against mechanical impacts, pathogens, and water loss, and involved in temperature regulation.

Melanin

A pigment that gives color to skin, hair, and eyes, and provides protection against UV radiation.

Skin Pigmentation

The coloring of the skin, influenced by melanin production, which protects against ultraviolet radiation and can vary widely among individuals and races.

Cell Growth

The process by which a cell increases in size or number, a fundamental aspect of developmental biology and tissue maintenance.