1. Biology B-Day 11/9/17 Bellringer
What are the tails of a phospholipid made of?
What are the channels in the membrane that aid in diffusion made of?
Agenda
Bellringer
Cell Membrane Coloring Worksheet
Vocabulary Journal
Cell Membrane Video

2. Biology B-Day 11/9/17 Bellringer
What are the tails of a phospholipid made of?
Fatty Acids
What are the channels in the membrane that aid in diffusion made of?
Proteins
Agenda
Bellringer
Cell Membrane Coloring Worksheet
Vocabulary Journal
Cell Membrane Video

3. Biology B-Day 11/13/17 Bellringer
What type of molecules can pass directly through the cell membrane?
Which type of fatty acid is liquid at room temperature and contains a double bond?
Agenda
Bellringer
Cell Transport Notes
Cell Transport Practice
Computer Lab to work on Lab Report

4. Biology B-Day 11/13/17 Bellringer
What type of molecules can pass directly through the cell membrane?
Small, hydrophobic
Which type of fatty acid is liquid at room temperature and contains a double bond?
Unsatuarated
Agenda
Bellringer
Cell Transport Notes
Cell Transport Practice
Computer Lab to work on Lab Report

5. Biology B-Day 11/15/17 Bellringer
If a beaker contains 20% salt and the baggie contains 50% salt, which way will water move?
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes…
Agenda
Bellringer
Cell Membrane Structure and Function POGIL
Cell Transport POGIL

6. Biology B-Day 11/15/17 Bellringer
If a beaker contains 20% salt and the baggie contains 50% salt, which way will water move?
Water will move into the baggie
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes…
Water to move into the cell
Agenda
Bellringer
Cell Membrane Structure and Function POGIL
Cell Transport POGIL

7. Biology B-Day 11/17/17 Bellringer
What type of transport requires energy and moves against the concentration gradient?
What type of transport requires the help of carrier proteins?
Agenda
Bellringer
Diffusion Lab
Osmosis ORQ

8. Biology B-Day 11/17/17 Bellringer
What type of transport requires energy and moves against the concentration gradient?
Active transport
What type of transport requires the help of carrier proteins?
Facilitated diffusion
Agenda
Bellringer
Diffusion Lab
Osmosis ORQ

9. Biology B-Day 11/21/17 Bellringer
If a beaker contains 20% salt and the baggie contains 50% salt, which way will water move?
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes…
Agenda
Bellringer
Cell Membrane Quiz
Cell Transport Practice
Computer Lab to Finish Lab Report

10. Biology B-Day 11/21/17 Bellringer
If a beaker contains 20% salt and the baggie contains 50% salt, which way will water move?
Water will move into the baggie
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes…
Water to move into the cell
Agenda
Bellringer
Cell Membrane Quiz
Cell Transport Practice
Computer Lab to Finish Lab Report

11. Cell Membrane (Transport) Notes
Cell Membrane and Cell Wall:
ALL cells have a cell membrane made of proteins and lipids
Cell Membrane
lipid bilayer
protein channel
protein pump
Layer 1
Layer 2
Molecules move into and out of a cell membrane.
The cell membrane is selectively permeable.
How certain molecules move through the cell is called cell transport.
-passive transport
-active transport

12. Fluid Mosaic Model
The cell membrane is described as fluid because individual phospholipids and proteins can move side-to-side within the layer, like it’s a liquid.
The cell membrane is described as mosaic because of the pattern produced by the scattered protein moelecules when the membrane is viewed from above.

13. Fluid Mosaic Model Recall:
The cell membrane is made of 2 layers of phospholipids called the lipid bilayer.
Hydrophobic molecules pass easily; hydrophilic DO NOT

14. Concentration: Amount of solute in a certain amount of solvent
Solvent- what does the dissolving
Solute-what is dissolved in the solvent
The difference in concentrations will cause molecules to move through the semi-permeable membrane
Molecules move until evenly distributed

15. Passive Transport
A process that does not require energy to move molecules from a HIGH to LOW concentration
Three main types:
Diffusion
Facilitated Diffusion
Osmosis

16. Some molecules can pass directly through the membrane
Simple Diffusion
Some molecules can pass directly through the membrane
These molecules are usually small with little or no electrical charge (O2, CO2, etc.)
Movement of molecules from areas of high concentration to areas of low concentration.
Does this require energy? NO
Will diffuse until molecules reach equilibrium (equal concentrations)
Dynamic equilibrium
(still moving)
outside of cell
inside of cell

17. HIGH to LOW concentration
Diffusion
HIGH to LOW concentration

18. Semi-permeable membrane is permeable to water, but not to sugar
Osmosis is the diffusion of water through a selectively permeable membrane like the cell membrane
Water diffuses across a membrane from an area of high concentration to an area of low concentration.
No energy required = passive transport
Occurs until reaches dynamic equilibrium
Semi-permeable membrane is permeable to water, but not to sugar

21. Click

22. Hypertonic Solutions: contain a high concentration of solute relative to another solution (e.g. the cell's cytoplasm). When a cell is placed in a hypertonic solution, the water diffuses out of the cell, causing the cell to shrivel.
Hypotonic Solutions: contain a low concentration of solute relative to another solution (e.g. the cell's cytoplasm). When a cell is placed in a hypotonic solution, the water diffuses into the cell, causing the cell to swell and possibly explode.
Isotonic Solutions: contain the same concentration of solute as another solution (e.g. the cell's cytoplasm). When a cell is placed in an isotonic solution, the water diffuses into and out of the cell at the same rate. The fluid that surrounds the body cells is isotonic.

24. Interactive Red Blood Cell
Click

25. Proteins that form channels (pores) are called protein channels
Facilitated Diffusion is the movement of larger molecules like glucose through the cell membrane – larger molecules must be “helped”
Proteins in the cell membrane form channels for large molecules to pass through
Proteins that form channels (pores) are called protein channels
outside of cell
inside of cell
Glucose molecules

26. Active Transport
Active transport is the movement of molecules from LOW to HIGH concentration.
Energy is required as molecules must be pumped against the concentration gradient.
Proteins that work as pumps are called protein pumps.
Ex: Body cells must pump carbon dioxide out into the surrounding blood vessels to be carried to the lungs for exhale. Blood vessels are high in carbon dioxide compared to the cells, so energy is required to move the carbon dioxide across the cell membrane from LOW to HIGH concentration.
outside of cell
inside of cell
Carbon Dioxide molecules

28. ANALOGY: ENERGY NEEDED: Active Transport NO ENERGY NEEDED: Diffusion
Osmosis
Facilitated Diffusion
ENERGY NEEDED:
Active Transport

30. Endocytosis and Exocytosis is the mechanism by which very large molecules (such as food and wastes) get into and out of the cell
Food is moved into the cell by Endocytosis
Wastes are moved out of the cell by Exocytosis

32. Ex: White Blood Cells, which are part of the immune system, surround and engulf bacteria by endocytosis.

33. Osmosis—Elodea Leaf