Two Opposing Mechanisms Determine Alveolar Expansion: ________ Leads to Alveolar

question 32

Multiple Choice

Two opposing mechanisms determine alveolar expansion: ________ leads to alveolar expansion, while ________ opposes alveolar expansion.

• A) lung recoil; positive pleural pressure
• B) positive pleural pressure; lung recoil
• C) lung recoil; negative pleural pressure
• D) negative pleural pressure; lung recoil

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Definitions:

Secretin

A hormone produced by the duodenum that stimulates the pancreas to release bicarbonate-rich fluids to neutralize stomach acid.

Gastrin

A hormone produced by the stomach that stimulates the secretion of gastric acid.

CCK

Cholecystokinin, a hormone that stimulates the digestion of fats and proteins by promoting the release of digestive enzymes and bile from the pancreas and gallbladder.

Submucosa

A layer of tissue beneath the mucosa, containing blood vessels, nerves, and connective tissue, providing support and nourishment to the mucosal layer.