A 'red-hot' bacterial infection of the intestinal tract irritates the intestinal cells and interferes with digestion. Such a condition is often accompanied by diarrhea, which causes loss of body water. On the basis of what you have learned about osmotic water flows, explain why diarrhea may occur.

검증된 단계별 안내

Understand that diarrhea involves the rapid movement of water into the intestinal lumen, leading to loose or watery stools.

Recall that osmotic water flow occurs when there is a difference in solute concentration across a membrane, causing water to move toward the area with higher solute concentration to balance the osmotic pressure.

Recognize that during a bacterial infection, the intestinal cells become irritated and damaged, which can impair their ability to absorb nutrients and electrolytes properly.

Because digestion and absorption are disrupted, undigested solutes (such as sugars, salts, and other molecules) remain in the intestinal lumen, increasing its osmolarity compared to the surrounding tissues.

As a result, water moves osmotically from the body tissues into the intestinal lumen to try to equalize solute concentrations, leading to increased water content in the intestines and causing diarrhea.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Osmosis and Osmotic Pressure

Osmosis is the movement of water across a semipermeable membrane from an area of low solute concentration to high solute concentration. Osmotic pressure is the force that drives this water movement, balancing solute concentrations on both sides of the membrane.

Intestinal Cell Function and Absorption

Intestinal cells absorb nutrients and water from digested food. When these cells are irritated or damaged, their ability to absorb solutes and water decreases, disrupting normal fluid balance in the intestines.

Cause of Diarrhea in Osmotic Imbalance

If solutes remain in the intestinal lumen due to poor absorption, water moves into the intestines by osmosis to balance solute concentration. This excess water causes diarrhea, leading to loss of body water and dehydration.