The cell in its environment
Download
1 / 12

The Cell in its Environment - PowerPoint PPT Presentation


  • 121 Views
  • Uploaded on

The Cell in its Environment. The Cell Membrane stars in:. The Gatekeeper. What we ALREADY know:. Cell membrane is found around the outside of an animal cell and it is the second layer of a plant cell. The job of a cell membrane is to let “things” in and out of the cell.

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 'The Cell in its Environment' - keelie-nichols


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
The cell in its environment
The Cell in its Environment

The Cell Membrane stars in:

The Gatekeeper


What we already know
What we ALREADY know:

  • Cell membrane is found around the outside of an animal cell and it is the second layer of a plant cell

  • The job of a cell membrane is to let “things” in and out of the cell


What we will soon know
What we will soon KNOW:

  • The Cell Membrane welcomes needed materials in 3 different ways…

  • The Cell Membrane disposes of unneeded materials inside the cell by sending them out in 3 different ways…


Selectively permeable
Selectively Permeable:

= some materials can pass through an object while others cannot

Permeable= “to pass though” in Latin

1. Usually permeable to oxygen, water and carbon dioxide

2. Unlikely permeable to large objects and salts


3 methods of moving in and out of the cell
3 Methods of Moving in and out of the Cell:

1. DIFFUSION

2. OSMOSIS

Passive transport

3. ACTIVE TRANSPORT


A passive transport
A. PASSIVE TRANSPORT:

= the movement of materials across the membrane WITHOUT Energy

Let’s learn about the methods of PASSIVE transport……..



1 diffusion
1. Diffusion:

Process where molecules in high conc. will move to areas of low conc.



2 osmosis diff of h2o
2. Osmosis: Diff. of H2O

Neato fact: osmosis is what makes fresh and salt water fish so different…


B active transport
B. ACTIVE TRANSPORT!!!

= the movement of materials through a membrane USING energy


1 gross it did what
1. Gross… it did what?!?!

Endocytosis!!! = 1) the cell membrane surrounds or engulfs a particle and then 2) it will pinch off to form a vacuole around it in the cell (this still uses E)