Diffusion osmosis
Download
1 / 10

Diffusion & Osmosis - PowerPoint PPT Presentation


  • 99 Views
  • Uploaded on

Diffusion & Osmosis. Objective 2.03 Movement of materials into and out of cells. Passive Transport. Passive Transport : Movement within the cell that does not cost the cell any energy (ATP).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Diffusion & Osmosis' - fynn


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Diffusion osmosis

Diffusion & Osmosis

Objective 2.03

Movement of materials into and out of cells.


Passive transport
Passive Transport

  • Passive Transport: Movement within the cell that does not cost the cell any energy (ATP).

    • Diffusion: The movement of particles from an area of high concentration to an area of low concentration.

      • Diffusion is free for the cell.

      • When the equilibrium is reached, the cell is in homeostasis.

Diffusion Clip


Passive transport1
Passive Transport

  • Facilitated Diffusion: a.k.a. “Helped” diffusion. The large protein channels help bring larger molecules that can’t squeeze through the cell membrane into the cell. This process is “free” to the cell and does not require the cell to use energy ATP.

Facilitated Diffusion Clip


Transport proteins
Transport Proteins

  • There are 2 types of transport proteins:

    • Channel Proteins = cannot change shape (a)

    • Carrier Proteins = can change shape (b)


Passive transport2
Passive Transport

  • Osmosis: The diffusion of water across a semi permeable membrane.

    • This process if free for the cell also. Does NOT cost the cell energy (ATP).

      Hypertonic Isotonic Hypotonic

      (Cell Shrinks) ( Dynamic Equilibrium) (Cell Swells)

65% Salt

Solution

20% Salt

Solution

50% Salt

Solution

90% Salt

Solution

50% Salt

Solution

10% Salt Solution


Cells in solutions
Cells in Solutions

Bursts Shrivels

Turgor Pressure – Plasmolysis-

cell membrane “pushes” cell membrane pulling

on cell wall away from cell wall


Active transport
Active Transport

  • Active Transport: Cells force molecules AGAINST the concentration gradient.

    • This process costs the cell energy (ATP)!

    • Protein Chanels and Pumps are used to move these molecules.