Certified Neuroscience Registered Nurse (CNRN) Practice Exam

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Prepare for the CNRN Exam. Test your knowledge with our comprehensive multiple-choice questions and detailed explanations. Boost your confidence and improve your chances of a successful exam outcome!

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What occurs during parasympathetic stimulation of the vagus nerve?

Decreased motility and secretion
Increased motility and relaxation of the pyloric sphincter
Increased stress response
Reduced blood flow to the GI tract

The correct answer is: Increased motility and relaxation of the pyloric sphincter

During parasympathetic stimulation of the vagus nerve, there is a significant increase in motility as well as relaxation of the pyloric sphincter. The vagus nerve plays a crucial role in the parasympathetic nervous system, which is responsible for the body's "rest and digest" activities. This activation promotes digestive processes, enhancing peristalsis—the coordinated muscle contractions that move food through the gastrointestinal tract. Additionally, the relaxation of the pyloric sphincter facilitates the passage of chyme from the stomach into the small intestine, allowing for optimal digestion and nutrient absorption. This contrasts with the sympathetic nervous system, which would inhibit digestive activities during stress or emergency situations. The overall effect of vagal stimulation leads to improved gastrointestinal function and increased digestive secretion, thereby supporting efficient digestion.