Multiple Choice Questions on Gastrointestinal Disorders Quizlet Related

Review Multiple Choice Questions on Gastrointestinal Disorders Quizlet related questions and content

In which region of the GI tract is the longitudinal muscle of the muscularis arranged into distinct longitudinal bundles?

  • A. Duodenum
  • B. Jejunum
  • C. Ileum
  • D. Colon
Correct Answer: D

Rationale: The correct answer is D: Colon. The colon has the longitudinal muscle of the muscularis arranged into distinct longitudinal bundles called taeniae coli. This unique structure helps in the formation of haustra, the pouches seen in the colon. In contrast, the duodenum, jejunum, and ileum do not have this specific arrangement of longitudinal muscle bundles. The duodenum has a smooth muscle layer, while the jejunum and ileum have a continuous layer of smooth muscle without distinct longitudinal bundles. Therefore, the colon is the region of the GI tract where the longitudinal muscle is organized into distinct bundles.