Download What is the cell membrane?

Type of
Transport
Simple
Diffusion
Facilitated
Diffusion
Active
Transport
Transport
Protein
Used?
Direction of
movement
Requires Energy
input from
cell?
Classification of
transport?
Types of
Substances
CELL MEMBRANE AND
CELL TRANSPORT NOTES
Standard
Cell Biology
1. a. Students know cells are enclosed
within semipermeable membranes that
regulate their interaction with their
surroundings.
https://www.youtube.com/watch?v=owEgq
rq51zY
What is the cell membrane?
____________________________________
____________________________________
____________________________________
The structure of the cell membrane
 The cell membrane
consists of a lipid bilayer
(lipid = fat; bi=2) plus
proteins that straddle the
bilayer. Attached to the
proteins are
carbohydrates.
 _____________________
_____________________
_____________________
_____________________
_____________________
Draw the cell membrane
Cell Membrane Video
https://www.youtube.com/watch?v=S7CJ7
xZOjm0
You should be able to answer these
questions:
1.
2.
3.
4.
5.
Describe the structure of the cell membrane.
How do molecules get into and out of the cell?
What is selective permeability?
What is diffusion and how does it work?
What is facilitated diffusion and how does it
work?
6. What is active transport and how does it work?
7. What is osmosis and how does it work?
8. What is the function of transport proteins?
Transport through the Cell Membrane
Cell membranes are selectively
permeable (semipermeable).
Permeable-
Impermeable-
Selectively Permeable (semi permeable)-
Transport Through the Membrane
Passive Transport:
1. ________________
2. __________________
________________
Active Transport
Simple Diffusion
Notes:
 Solution-
 Solvent-
 Solute-
 Concentration-
Think of living cells like little bags of
solutions surrounded by a
semipermeable membrane!
For the cell to survive, the
concentration of solutes must stay
within a safe range to maintain
homeostasis.
Concentration Gradient- when
there is a difference in
concentrations
High concentration: ________________
Low concentration: ________________
In diffusion,
__________________________________
__________________________________
__________________________________
__________________________________
Facilitated Diffusion
Notes:
Carrier Proteins
Channel Proteins
Passive Transport: Facilitated Diffusion
https://www.youtube.com/watch?v=vKGN_
Zhz8AY
Active Transport
Notes:
Active Transport
Active Transport
https://www.youtube.com/watch?v=yz7EH
JFDEJs
Other Types of Active Transport

Endocytosis –
 Phagocytosis –
 Pinocytosis –

Exocytosis –
Endocytosis and Exocytosis
https://www.youtube.com/watch?v=qpw2p
1x9Cic
Osmosis- the diffusion of water
Notes:
Concentration Strength

Isotonic –

Hypotonic –

Hypertonic –
Osmotic Pressure
Notes:
Red Blood Cells in a
Hypertonic Solution
https://www.youtube.com/watch?v=OYoaL
zobQmk
Plants and Osmosis
Applications of Osmosis
Water overdose/intoxication
High concentration of fertilizer kills plants
Water enters the roots of plants
Why drinking salt water can kill you
Why putting salt on a slug or snail kills it
How dialysis machines work
The preservation of foods in salt brines (olives,
fish vegetables)  kills bacteria
Refresh wilted salad greens by putting in water
Cell Quiz
1.
2.
What are two differences between prokaryotes and eukaryotes?
An animal cell is a prokaryotic/eukaryotic cell. (circle the correct
answer)
3. When preparing a wet mount, the cover slip should be put on at an
angle to avoid ______.
4. The ______ contains the DNA and controls the cell.
5. Diffusion is the movement of molecules from a ______ to a _______
concentration.
6. If a cell has 95% water and it is placed in a hypertonic solution, water
will move out of/into the cell. (circle the correct answer)
7. _________ are where photosynthesis occurs in plant cells.
8. A bacteria is a prokaryotic/eukaryotic cell. (circle the correct answer)
9. On high power, more/less of the cell can be seen. circle the correct
answer)
10. What two things happen to an image when viewed under a
microscope?
11. Choose and explain one of the following: endocytosis, phagocytosis,
pinocytosis, or exocytosis.