NAME THE FOLLOWNG:--
The covering worn over the nose and mouth to avoid the inhalation of airborne allergens.
Answers
Explanation:
A dust mask is a flexible paper pad held over the nose and mouth by elastic or rubber straps for personal comfort against non-toxic nuisance dusts. They are not intended to provide protection from toxic airborne hazards.
Answer:
Allergies are abnormal immune system reactions to things that are typically harmless to most people. When you're allergic to something, your immune system mistakenly believes that this substance is harmful to your body. (Substances that cause allergic reactions — such as certain foods, dust, plant pollen, or medicines — are known as allergens.)
What Happens in Allergies?
In an attempt to protect the body, the immune system produces IgE antibodies to that allergen. Those antibodies then cause certain cells in the body to release chemicals into the bloodstream, one of which is histamine (pronounced: HIS-tuh-meen).