Which Respiratory Surface Lacks Physical Protection from the External Environment

question 40

Multiple Choice

Which respiratory surface lacks physical protection from the external environment?

• A) tracheal system tubes
• B) human lungs
• C) external gills
• D) internal gills
• E) bird lungs

---

Definitions:

Hypertension

A chronic medical condition characterized by elevated blood pressure, which increases the risk of heart disease, stroke, and other health issues.

Autoimmune Reaction

A response of the immune system where it mistakenly attacks the body's own tissues, mistaking them for harmful pathogens.

Gluten

The insoluble protein (prolamines) constituent of wheat and other grains; a mixture of gliadin, glutenin, and other proteins; believed to be an agent in celiac disease.

Clear Diet

A dietary regimen consisting only of transparent liquids and foods that turn into clear liquids at room temperature, often recommended before medical procedures.