Glucose and amino acids are adsorbed in intestine by
a) Osmosis
b) Passive transport
c) Active transport
d) Both active and passive

Options

A. Osmosis
B. Passive transport
C. Active transport
D. Both active and passive

Answer

**Step-by-Step Solution:**

1. **Understanding Absorption Mechanisms**: The absorption of nutrients in the intestine can occur through various mechanisms, including osmosis, passive transport, and active transport.

2. **Evaluating Osmosis**: Osmosis is the movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration. It primarily involves water, not glucose or amino acids directly.

3. **Exploring Passive Transport**: Passive transport allows substances to move across membranes without the use of energy, following their concentration gradient (from high to low concentration). This method can be used for some nutrients but is not the primary method for glucose and amino acids.

4. **Understanding Active Transport**: Active transport requires energy (in the form of ATP) to move substances against their concentration gradient (from low to high concentration). This is crucial for the absorption of glucose and amino acids, as they often need to be transported into cells where their concentration is higher than in the intestinal lumen.

5. **Conclusion**: Glucose and amino acids are absorbed in the intestine through both active transport (which requires energy) and passive transport (which does not require energy). Therefore, the correct answer is option d) Both active and passive.

**Final Answer**: d) Both active and passive

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