The absorption of vitamin B-6 is by ______ diffusion.Multiple choice question.facilitatedpassiveactive

Break Down the Problem

1. Identify the type of diffusion associated with vitamin B-6 absorption.
2. Evaluate the definitions of the options: facilitated diffusion, passive diffusion, and active transport.

Relevant Concepts

3. Facilitated Diffusion: A process that allows substances to cross membranes with the assistance of special proteins.
4. Passive Diffusion: The movement of molecules from an area of higher concentration to an area of lower concentration without energy input.
5. Active Transport: The movement of molecules against their concentration gradient, requiring energy.

Analysis and Detail

6. Vitamin B-6 is typically absorbed through the intestinal wall via a specialized transport mechanism. It does not require energy input, meaning it follows the concentration gradient, but it does use specific carriers to facilitate the uptake.

Verify and Summarize

7. Based on the criteria for facilitated diffusion and passive diffusion, vitamin B-6 absorption is more accurately described by facilitated diffusion due to the use of specific transport proteins.

Final Answer

The absorption of vitamin B-6 is by facilitated diffusion.