Cartilage and Mucous Are Both Slippery Because

question 89

Multiple Choice

Cartilage and mucous are both slippery because:

• A) Short polymers comprise these compounds.
• B) The charge repulsion between the many acid groups in these polymers.
• C) The sticky nature of sugars.
• D) Both charge repulsion of acidic groups and the sticky nature of sugars.
• E) All of these

---

Definitions:

Muscularis Externa

A layer of muscle in the gastrointestinal tract wall that is responsible for peristalsis and segmentation movements.

Serosa

A smooth membrane consisting of mesothelial cells, covering the exterior of abdominal organs and lining the cavity they reside in.

Submucosa

The layer of dense irregular connective tissue or fibrous connective tissue beneath the mucosa layer, supporting it and connecting it to other tissues.

Parietal Cells

Cells in the lining of the stomach that produce hydrochloric acid and intrinsic factor, crucial for digestion and B12 absorption.