Final answer:
The statement regarding the use of a bellows or bulb duster to apply dust into small areas is true. Such a duster is often used for applying insecticides in confined spaces. Various types of harmful substances like pathogens, pollutants, and allergens can cause respiratory illnesses with various health effects.
Step-by-step explanation:
True or False: A "bellows" or "bulb" type duster is used to apply small amounts of dust into small confined areas. The statement is True.
A bellows or bulb duster is a tool designed for precisely that purpose—applying fine particles of dust, such as insecticides, in controlled amounts into tight spaces where pests may be living or entry points that are difficult to access with larger equipment.
Three different types of substances that can enter the respiratory system and cause illness or injury are pathogens, pollutants, and allergens. Pathogens such as viruses, bacteria, and fungi can lead to infections like pneumonia, bronchitis, and tuberculosis.
Pollutants, including airborne chemicals and particulate matter from industrial sources or vehicles, can cause chronic conditions like COPD or acute reactions like asthma attacks. Allergens, such as pollen, dust mites, and animal dander, can provoke allergic reactions and exacerbate asthma.