When Kevin Looks in the Mirror,he Sees a Different Face

question 49

Multiple Choice

When Kevin looks in the mirror,he sees a different face than he did in his younger days,when he was galloping horses across the "big screen" and thrilling the girls.The lines and wrinkles on Kevin's face are due to a process explained by the __________ theory of aging.

• A)cross-linkage
• B)homeostatic imbalance
• C)autoimmunity
• D)wear and tear

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Definitions:

Phospholipids

A class of lipids that are a major component of all cell membranes, consisting of two fatty acids, a phosphate group, and a glycerol molecule.

Fatty Acids

Long chains of hydrocarbon molecules with a carboxylic acid group, which are components of lipids and play roles in energy storage and cellular structure.

Potassium Ion

A positively charged ion (K+) essential for various biological processes, including nerve transmission and muscle contraction.

Simple Diffusion

The movement of molecules from an area of higher concentration to an area of lower concentration without the need for energy input or assistance of membrane proteins.