Final answer:
True, using a biological safety cabinet is indeed an example of a primary barrier, designed to filter particulates and protect users from exposure to infectious agents in a laboratory setting.
Step-by-step explanation:
Using a biological safety cabinet/hood is an example of a primary barrier. This statement is True. Biological safety cabinets (BSCs) play a crucial role in containing biological agents and preventing contamination of samples and the environment.
They are equipped with HEPA filters to remove particulates from the air, protecting laboratory personnel from exposure to infectious agents.
BSCs are categorized into different classes based on the level of protection they offer, with Class I protecting workers and the environment, Class II offering directional airflow and a partial barrier system, and Class III designed for work with highly infectious agents providing maximum confinement.