Gastrointestinal Assessment Questions Related

Review Gastrointestinal Assessment Questions related questions and content

Salivary secretion is stimulated by

  • A. the salivary nucleus only.
  • B. the salivary nucleus and gastrin.
  • C. gastrin only.
  • D. the salivary nucleus and local reflexes in the tunica mucosa and submucosa.
Correct Answer: D

Rationale: The correct answer is D. Salivary secretion is stimulated by the salivary nucleus in the brainstem and local reflexes in the tunica mucosa and submucosa of the oral cavity. The salivary nucleus receives input from higher brain centers and initiates the salivary reflex. Local reflexes in the oral cavity, such as mechanical stimulation of the mucosa, also trigger salivary secretion. Gastrin, as mentioned in option B and C, is not directly involved in the stimulation of salivary secretion. Option A is incorrect as salivary secretion is not solely stimulated by the salivary nucleus. Option D encompasses the comprehensive stimulation pathways involved in salivary secretion.