The cell in its environment
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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.

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The Cell in its Environment

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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……..


What will happen

What will happen?!?


1 diffusion

1. Diffusion:

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


The cell in its environment

QUIZ!!!


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)


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