Question
Water is absorbed in the intestine through which of the following processes? a. Facilitated transport b. Simple diffusion c. Active transport d. Active diffusion
Ask by Kelley Martin. in the United States
Mar 10,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
Water is absorbed in the intestine through simple diffusion.
Solution
1. Water absorption in the intestine occurs passively along the osmotic gradient.
2. In the intestine, water moves from a region of lower solute concentration (inside the lumen) to a region of higher solute concentration (in the epithelial cells and interstitial fluid) without the need for energy expenditure.
3. This process is known as simple diffusion, where water moves directly across the cell membrane according to the concentration gradient.
Therefore, the correct answer is:
\( \textbf{b. Simple diffusion} \)
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Simplify this solution Bonus Knowledge
Water is primarily absorbed in the intestine through simple diffusion, where it moves across the intestinal cell membranes from an area of higher concentration to an area of lower concentration, effectively balancing the concentration gradient. This passive process is vital for maintaining hydration and electrolyte balance in the body. In addition to simple diffusion, facilitated transport also plays a role in water absorption, particularly through specialized channels called aquaporins. These channels help speed up the movement of water when the body needs to absorb it rapidly, ensuring efficient hydration during digestion and absorption!
