Some Scientists Believe That Restricting Calories Increases Longevity by Lowering

question 85

Multiple Choice

Some scientists believe that restricting calories increases longevity by lowering the body's level of

• A) protein.
• B) free radicals.
• C) fat.
• D) nutrients.

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Definitions:

Calcium Ion Concentration

The level of calcium ions (Ca2+) in a particular system, important for various cellular processes including signal transduction and muscle contraction.

Parathyroid Glands

Small endocrine glands in the neck that produce parathyroid hormone (PTH), which regulates calcium levels in the blood.

Fight-or-Flight Response

A biological response triggered by the perception of danger, hostility, or a threat to one's existence.

Secondary Sex Characteristics

Changes that develop during puberty; in males, include growth of facial and body hair, muscle development, and the increase in vocal cord length and thickness that causes the voice to deepen; in females, include development of the breasts, broadening of the pelvis, and the development and distribution of muscle and fat responsible for the female body shape.