During histological examination of a bowel biopsy, a network of neurons is identified lying between the longitudinal and circular layers of the muscularis externa. This plexus is responsible primarily for:

• A Regulating secretion and absorption by the mucosa
• B Transmitting conscious visceral sensation to the spinal cord
• C Modulating local blood flow through submucosal arterioles
• D Coordinating gastrointestinal motility and peristaltic activity ✓

Explanation

The myenteric plexus of Auerbach sits between the longitudinal and circular muscle coats of the muscularis externa and controls gut motility, peristalsis and tone. The submucosal plexus of Meissner lies in the submucosa and regulates secretion, absorption and mucosal blood flow, which makes option A the description of Meissner plexus function. Enteric neurons handle local reflexes without transmitting conscious sensation to the cord, so option B is incorrect.

Reference: Robbins and Cotran Pathologic Basis of Disease, 10th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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