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Chemistry LibreTexts

5.02 Review Questions

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    Answer the following questions, then use the Submit button on the right to turn in your work.

    1. Explain what a concentration gradient is  and what it means for a molecule to diffuse down the concentration gradient.
    2. Explain why facilitated diffusion does not require energy from a cell.
    3. How are receptors and transport proteins similar?
    4. When a person becomes dehydrated due to the loss of fluids and solutes, a saline solution (water and salts) is infused into the bloodstream by medical personnel. Why is saline solution used instead of pure water?