Chapter 3 Cell Membrane Selectively permeable allows some things to enter and leave Cell Membrane Made of phospholipid bilayer Cell Membrane Made of a series of proteins httpswwwyoutubecomwatchvmoPJkCbKjBs ID: 538554
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Slide1
Cell Processes
Chapter 3Slide2
Cell Membrane
Selectively permeable: allows
some
things to enter and leave
Slide3
Cell Membrane
Made of phospholipid bilayerSlide4
Cell Membrane
Made of a series of proteins.
https://www.youtube.com/watch?v=moPJkCbKjBs
(first two minutes)Slide5
Passive transport
Substance moves through membrane without the input of energy.
Concentration: high to low.
Concentration is the measure of a component in a solution.
sugar example.Slide6
There are 3 processes that are passive transport:
Diffusion
Facilitated diffusion
OsmosisSlide7
Diffusion
Random
movement of molecules from an area of more molecules to an area of less molecules until equilibrium.
Classroom exampleSlide8
Osmosis
The diffusion of water through a cell membrane.
Eggplant labSlide9
Facilitated Diffusion
Some substances, like Glucose, can only enter the cell with help from a transport protein. Slide10
Video to wrap things up.
https://www.youtube.com/watch?v=Ptmlvtei8hwSlide11
Active Transport
The cell has to use energy to move materials through the membrane.
Concentration: low to high- not normal way.
Some molecules are too large for diffusion. Slide12
Active Transport
Where does the cell get the energy?
Energy= ATPSlide13
Active Transport
There are two types:
Endocytosis
ExocytosisSlide14
Endocytosis
The cell takes substances INSIDE by surrounding
the molecule
with the cell membrane.
Endo:INSIDE
What kinds of things does a cell want to bring in?Slide15
EndocytosisSlide16
EndocytosisSlide17
Endocytosis
Where is the food before the cell membrane engulfs it?
Where does the food go after the cell membrane engulfs it?
Where did the water inside the food vacuole come from?Slide18
Exocytosis
The cell takes substances OUTSIDE itself by releasing a vesicle
Exo: EXIT
What kinds of things does a cell want to get rid of or send out?Slide19
ExocytosisSlide20
Endocytosis and Exocytosis
Video
https://www.youtube.com/watch?v=AnePocfJqWk
Slide21
Quiz- which is which?Slide22
Quiz- Identify the picture as osmosis, diffusion, or facilitated diffusionSlide23
Quiz- Identify the picture as osmosis, diffusion, or facilitated diffusionSlide24
Quiz- Identify the picture as osmosis, diffusion, or facilitated diffusionSlide25
Activity
Pretend the bag is a cell. The cell needs to eat a large molecule like glucose (sugar). Your group needs to figure out how to get the molecule outside the cell without exposing the inside of the cell to the outside air. You cannot put it through the top, But you can put your hand through the top if you need to. You will need to use all the supplies given. If the cell is expelling molecules, what kind of active transport is happening?Slide26
Activity cont
.
Do it again, but this time, you have to try to get the molecule inside the cell.
If you are putting molecules inside the cell, what type of active transport are you performing?Slide27
Questions to consider:
What represented the cell membrane?
What surrounded the molecule (lima bean) after you got it inside or outside the cell?