To Get Rid of Excessive Heat When a Person Gets

question 24

Multiple Choice

To get rid of excessive heat when a person gets hot,the small blood vessels near the skin:

• A) Constrict
• B) Dilate

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Definitions:

HgO

HgO refers to mercury(II) oxide, a solid compound consisting of mercury and oxygen, known for decomposing into mercury and oxygen gas when heated.

Methane Gas

A colorless, odorless flammable gas that is a major component of natural gas, used as a fuel and in the production of various chemicals.

Carbon Dioxide

A gas characterized by its lack of color and smell, produced when carbon and organic compounds burn, and during the respiration process, which plants absorb in photosynthesis.

Definite Proportions

A principle stating that a chemical compound always contains its component elements in fixed ratio by mass and does not depend on its source and preparation method.