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Homework Help: General Biology - Simple/Facilitated Diffusion & Active Transport

  1. Oct 4, 2009 #1
    1. The problem statement, all variables and given/known data

    (Last one!) I think I filled out this table correctly, I just want someone to check over it for me, if you would :)

    Oxygen enters cells by simple diffusion, glucose enters most cells by carrier assisted (facilitated) diffusion, the sodium/potassium pump removes sodium from cells and, when it enters at all sodium enters through ion channels.

    Fill out the following chart:
    http://img97.imageshack.us/img97/5791/bio1.jpg [Broken]

    2. Relevant equations

    Information you need to understand-

    Passive Transport: moves "down" gradient from high concentration to low concentration. energy comes from gradient; not the cell. 2 types

    1. Simple Diffusion:: can diffuse directly through plasma membrane, small in size/ hydrophobic
    2. Facilitated Diffusion:: there are proteins that help diffuse.

    Active Transport: moves "up" gradient from low concentration to high concentration. Uses energy from the cell (ATP) to move against the gradient.

    Sodium-Potassium Pump:: Sodium concentration higher on outside, Potassium concentration higher on inside. 3 Sodium out for every 2 Potassium in. Active transport.

    3. The attempt at a solution

    http://img9.imageshack.us/img9/9923/bio2pt.jpg [Broken]
    Last edited by a moderator: May 4, 2017
  2. jcsd
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