Which other organ can affect small-intestine motility?

• A. Kidney
• B. Liver
• C. Stomach
• D. Lung

Answer: (C)

Verified step by step guidance

1. Understand the concept of small-intestine motility: Small-intestine motility refers to the movement of the muscles in the small intestine that helps mix and propel food and digestive juices. This process is regulated by the enteric nervous system, hormones, and interactions with other organs.
2. Identify the role of the stomach in affecting small-intestine motility: The stomach plays a significant role in regulating small-intestine motility through the release of chyme (partially digested food) into the small intestine. This process is controlled by the pyloric sphincter and influenced by gastric hormones such as gastrin.
3. Examine the mechanism of communication between the stomach and small intestine: The stomach communicates with the small intestine via neural and hormonal signals. For example, the presence of food in the stomach triggers the release of hormones that prepare the small intestine for digestion and absorption.
4. Compare the roles of other organs listed in the problem: The kidney, liver, and lung do not directly influence small-intestine motility. While the liver contributes bile for digestion, it does not regulate motility. The kidney and lung are involved in other physiological processes unrelated to digestion.
5. Conclude why the stomach is the correct answer: Based on its direct involvement in regulating the flow of chyme and signaling mechanisms, the stomach is the organ that most significantly affects small-intestine motility.