How Does the Skin Act as a Barrier to Microbial

question 96

Multiple Choice

How does the skin act as a barrier to microbial invasion?

• A) Dead skin cells are packed with keratin, an antibacterial protein that punches holes in bacterial membranes.
• B) Sweat and sebaceous gland secretions inhibit bacterial growth.
• C) It releases B cells and T cells to fight infections.
• D) Dendritic cells patrol the skinʹs surface, producing secretions that inhibit microbe growth.

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Definitions:

Ordinal

A scale of measurement where numbers represent ordered categories that have a meaningful sequence, but the intervals between the categories are not necessarily equal.

Ratio Scales

Ratio scales are a type of measurement scale that not only have order and equal intervals but also have a true zero point, allowing for the calculation of ratios.

"True" Zero

A point on a scale of measurement that represents a complete absence of the property being measured, as opposed to a mere baseline or reference point.

NOIR

A commonly used acronym in statistics that stands for Nominal, Ordinal, Interval, and Ratio - the four levels of measurement for variables.