1 / 10

The Cell Membrane

The Cell Membrane. Aside from phospholipids, the cell or plasma membrane contains: Proteins Cholesterols Glycoproteins (proteins with a carbohydrate side chain) Glycolipids (lipids with a carbohydrate side chain). The Cell Membrane. Carbohydrate side chains. Proteins. Hydrophilic Region.

iram
Télécharger la présentation

The Cell Membrane

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Cell Membrane • Aside from phospholipids, the cell or plasma membrane contains: • Proteins • Cholesterols • Glycoproteins (proteins with a carbohydrate side chain) • Glycolipids (lipids with a carbohydrate side chain)

  2. The Cell Membrane Carbohydrate side chains Proteins Hydrophilic Region Hydrophobic Region Hydrophilic Region Phospholipid TEM of a red blood cell

  3. The Cell Membrane and Transport The cell membrane is selectivelypermeable (only certain substances are allowed to pass through) All cells have a plasma membrane, including plant, animal, and bacteria.

  4. CAN PASS THROUGH Things that can dissolve in fat Small molecules Water CAN NOT PASS THROUGH Things that can dissolve in water Large molecules Ions: Molecules with plus (+) or minus (-) charges CH2OH OH What can and can not pass through the membrane?

  5. What are the 3 types of solutions? • There are 3 types of solutions: • Hypertonic • Hypotonic • Isotonic

  6. What is an Isotonic Solution? • [Water] inside cell = [Water] outside cell • Cell is at equilibrium • Molecules are equally distributed in end • The amount of water entering the cell = the amount of water leaving the cell 95% water 95% water

  7. What is a hypotonic solution? • A solution that has MORE water, and LESS solute • The cell can lyse or burst if left in a hypotonic solution 100% water 95% water

  8. What is a hypertonic solution? • A solution that has LESS water and MORE solute • The cell will dehydrate 90% water 95% water

  9. Which direction does water flow? • Water doesn’t flow at all. • Water flows from an area of low concentration to an area of high concentration. • Water flows from an area of high concentration to an area of low concentration.

  10. Hypertonic Isotonic Hypotonic This type of passive transport is called osmosis.

More Related