The Reason a Life Jacket Helps You Float Is

question 23

Multiple Choice

The reason a life jacket helps you float is

• A)the jacket makes you weigh less.
• B)the jacket has the same density as an average human.
• C)the jacket repels water.
• D)if you sink,the jacket sinks.
• E)the density of both you and the jacket together is less than your density alone.

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Definitions:

Parathyroid Hormone

Parathyroid hormone is a hormone produced by the parathyroid glands that regulates calcium levels in the blood.

Calcitonin

A hormone secreted by the thyroid gland that helps regulate calcium levels in the blood by inhibiting bone resorption.

Calcium Levels

The concentration of calcium ions (Ca2+) in a biological system, which is crucial for various physiological processes including bone formation, muscle contraction, and blood clotting.

Thyroxin

Thyroxin, also known as thyroxine or T4, is a hormone produced by the thyroid gland, essential for regulating metabolism and growth in the body.