Gastrointestinal physiology intermediate
Select ALL structures or features identified in the lecture as part of the GI tract’s organization.
Answer
The tract is a continuous tubular structure, The submucosa contains connective tissue, Villi and crypts increase mucosal surface area, The duodenal submucosa may contain Brunner’s glands
Explanation
The lecture describes the GI tract as a **continuous tube** with connective tissue in the **submucosa**. It also states that villi and crypts increase mucosal exchange area and that **Brunner’s glands** occur in the duodenal submucosa. The myenteric plexus is not in the mucosa; it lies between the longitudinal and circular muscle coats. This question tests both structural features and accurate localization. **Key takeaway:** Villi and crypts expand the mucosal surface, while the myenteric plexus is between muscle layers.\n\n**Glossary:**\n- **Villi**: Finger-like epithelial extensions that increase surface area.\n- **Crypts**: Invaginations of the epithelium.\n- **Brunner’s glands**: Glands identified in the duodenal submucosa.
Related Questions
- Which sequence correctly lists the GI wall structures from the serosal side toward the lumen?(basic)
- Absorption is described as passage of digestion products across the GI mucosa into blood or lymph.(basic)
- Assignment question: Describe the major segments of the GI tract and name the associated organs that support its functions.(basic)
- The plexus lying between the longitudinal and circular muscle coats is the _____ plexus.(basic)
- Which GI wall structure lies between the longitudinal and circular muscle layers?(basic)
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