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BIOD 151 Module 3 Exam (Updated-2023/2024): Essential Human Anatomy & Physiology I
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Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might develop gastric/stomach ulcers. - Correct answer-Gastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess amounts would lead to erosion of the stomach lining. Explain in detail how the stomach contents enter the small intestine - Correct answer-The pyloric sphincter (valve), located at the base of the stomach, relaxes causing a small quantity of chyme to pass through the opening into the first part of the small intestine. This initiates a reflex that causes the muscles of the sphincter to contract and close the opening temporarily. Then the sphincter relaxes again and allows more chyme to enter.
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