Autoimmune Diseases Are Illnesses Resulting From

question 77

Multiple Choice

Autoimmune diseases are illnesses resulting from:

• A)the inability of the immune system to fight off harmful substances in the body.
• B)the degeneration of the immune system.
• C)the production of too many antibodies when fighting off an outside infection.
• D)the body attacking substances and tissues that are normally present in the body.

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Definitions:

Propellants

Chemicals that are used to propel an object by generating gas under pressure; common in rockets and aerosol cans.

Aerosol Cans

Containers that use pressurized gas to dispense substances in a fine spray.

N-hexane

A straight-chain alkane with the formula C6H14, used as a non-polar solvent in the extraction of edible oils from seeds and vegetables.

Densities

The mass of a substance per unit volume, indicating how compact the substance is.