1 / 10

HAP 3.3

HAP 3.3. “Movement Through Cell Membranes”. I. Passive Movement. A. Diffusion 1. Def – molecules or ions spontaneously move from high to low concentrations. 2. Quick movement a. 1000 mph 3. Equilibrium – uniform distribution 4. Requirements for a cell… a. Membrane is permeable

joel-holden
Download Presentation

HAP 3.3

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. HAP 3.3 “Movement Through Cell Membranes”

  2. I. Passive Movement A. Diffusion 1. Def – molecules or ions spontaneously move from high to low concentrations. 2. Quick movement a. 1000 mph 3. Equilibrium – uniform distribution 4. Requirements for a cell… a. Membrane is permeable b. Concentration gradient

  3. 5. Ex: pg. 60 “consider oxygen and carbon dioxide…” B. Facilitated Diffusion 1. Require help from protein carriers 2. Ex: glucose and amino acids 3. Types: a. Channel b. Carrier c. Gate

  4. C. Osmosis 1. Def – water molecules diffuse from high to low concentrations 2. Terms… a. Isotonic = equal pressure b. Hypertonic = movement out… c. Hypotonic = movement in…

  5. II. Active Movement A. Active Transport 1. Def – moves particles from low to high concentrations. a. Requires energy (ATP) b. a.k.a.  pumps c. Include…sugar, a.a., ions d. Also used in digestion

  6. B. Endocytosis and Exocytosis 1. Endocytosis – large particle enters a. Pinocytosis – “cell drinking” b. Phagocytosis – “cell eating” c. Receptor aided – pg. 65 2. Exocytosis – large particle leaves a. Wastes and hormones

More Related