1. Date: November 14, 2016
Aim #24: How does the structure of the cell membrane contribute to its function?
HW:
Daily Review of class notes.
Castle Learning GRADED QUIZ due Thursday by 10:30PM
Unit 3 Test Tuesday 11/22 (period 5) Wednesday 11/23 (period 1)
Do Now: Please take out the worksheet from yesterday 

2. Aim #24: How does the structure of the cell membrane contribute to its function?

3. 1) What is the function of the structure below?
CELL MEMBRANE
Its function is to CONTROL what enters and exits the cell.

4. 2) What is the cell membrane made up of?
Phospholipids
Proteins

5. 3) What is a phospholipid?
The cell membrane is composed of a special type of lipid (fat) called a phospholipid.
PHOSPHOLIPID BI-LAYER
This part of the phospholipid is afraid of water and tries to avoid it.

6. phospholipids

7. 4) What are types of proteins in the cell membrane?
Membrane Proteins:
Structural Proteins:
Transport Proteins: (Channels)
Receptor Proteins
Enzymes
STRUCTURAL PROTEIN
CHANNEL

8. 5) What are receptors? RECEPTORS
Receptors found on the cell surface aid in cell to cell communication.
Messengers (hormones) from other cells bind to these receptors (based on shape) and transfer information.

9. Receptors on cell membrane are involved in cell communication
Cell receptor
(receptor molecule)
Signal 1 is released from cell B and sent to cell A
Signal 2 is released by cell A and sent to cell B

10. How is the cell membrane different from an umbrella?
An umbrella is impermeable
It does not allow materials through

11. How is an umbrella different from a window screen?
The window screen is permeable
It allows materials through

12. 6) How is a window screen similar to the cell membrane?
The cell membrane is permeable-it allows materials through

13. 7) Do all things get through the cell membrane?
NO!
8) The cell membrane is SELECTIVELY PERMEABLE because it allows certain substances through and prevents other substances from passing.

14. What is the difference between these molecules?

15. Can the elephant get into the house?

16. Why do some things get through the cell membrane?
Small molecules are more likely to get through the cell membrane compared to big molecules

17. 9) What will get through the cell membrane?
Water
Glucose
CO2 O2
And other small molecules

18. Protein
lipid
Lipid: hydrophobic tail
Lipid: hydrophilic head