Components of the First Line of Defense Include All the Following

question 57

Multiple Choice

Components of the first line of defense include all the following, except

• A)the tough cell sheet of the upper epidermis of the skin.
• B)nasal hairs.
• C)flushing action of tears and blinking.
• D)flushing action of urine.
• E)phagocytic white blood cells.

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Definitions:

Lymphocytes

A subtype of white blood cells that play an integral role in the body's immune system, including T cells and B cells.

NK Cells

Also known as natural killer cells, they are a type of lymphocyte (white blood cell) that plays a critical role in the body's immune system by targeting tumor cells and virus-infected cells.

Macrophages

Large white blood cells that are part of the immune system and digest foreign particles and pathogens, playing a role in both innate and adaptive immunity.

Immune System

The body's defense mechanism against foreign pathogens, including microbes, viruses, bacteria, and other invaders.