Thursday 11/15 (period 10)
Warm-Up: What was the hardest part of the
test? What did you need more help with?
Agenda:
•Hand in Vocab into INBOX
•Go over Tests
Monday 11/26 (Period 10)
Warm-Up: What is the function of the cell (plasma)
membrane? Which type of cells have plasma membranes?
Agenda:
• Notes on the Plasma Membrane
• Cell Membrane WS
HW: Plasma Membrane Practice WS
Wednesday 12/7
Warm-Up: Describe the structure of the plasma membrane
Agenda:
• Go over HW (Cell Membrane WS)
• Demo: How is a balloon like a cell membrane?
• Finish Plasma Membrane Drawing
• Cell Membrane WS
QUIZ MONDAY
Friday 12/9
Warm-Up: Draw a phospholipid. Label the hydrophilic head
and hydrophobic tails.
Agenda:
• 3D Plasma Membrane Model
• Cell Membrane MCAS Open Response Question
HW: Study
QUIZ MONDAY
The Cell (Plasma) Membrane
Warm-Up: What is the function of the cell
(plasma) membrane? Which type of cells have
plasma membranes?
Agenda:
• Notes on the Plasma Membrane
• Plasma Membrane WS
HW: Plasma Membrane Drawing WS
- The Cell in Its Environment
Plasma Membrane:
A Selective Barrier
All cells are surrounded by a thin, flexible barrier known as
the cell (plasma) membrane (or lipid bilayer).
• The cell membrane protects the contents of the
cell and helps control the materials that enter and
leave which….. HELPS MAINTAIN HOMEOSTASIS!
Selective Permeability
• The plasma membrane allows some substances to pass
through while keeping others out
• ANALOGY: Fish Net
– Has holes that allow water and other things to pass
through but not the fish
Plasma Membrane
• The cell membrane is made of a double-layered
sheet called a phospholipid bilayer.
Lipid bilayer
• Phospholipid Bilayer: 2 layers of phospholipids
arranged tail-to-tail
• Phospholipids have hydrophillic heads & hydrophobic tails
LOVE water
HATE water
•The heads LOVE the water (because they are polar), thus are
facing the liquid inside/outside of the cell.
•The tails HATE the water (because they are nonpolar), so
they are facing towards the inside of the membrane.
Proteins
•Proteins can form channels (tunnels) for large substances to
easily pass through.
• Proteins can also form pumps to pump larger substances
from one side of the cell to the other using energy.
Carbohydrates
• Carbohydrates are attached to the proteins or lipids
at the membrane’s surface
• They act like chemical identification cards that allow
cells to recognize and interact with each other.
Carbohydrate chains
Cholesterol
• Cholesterol helps to prevent the fatty-acid tails from
sticking together
Fluid Mosaic Model
• Since there are so many different kinds of things in the cell
membrane (and the membrane can easily move) it is called
the “fluid mosaic model”.
Wednesday 12/7 (period 5/6)
Warm-Up: Describe the structure of the plasma membrane
Agenda:
• Hand in HW (Cell Membrane WS) into INBOX
• Finish Plasma Membrane Drawing
• MCAS Open Response Questions
HW: Plasma Membrane Practice WS
7.2 The Plasma Membrane
Learning Objectives
• Describe how a cell’s plasma membrane
functions
• Identify the roles of proteins, carbohydrates,
and cholesterol in the plasma membrane
Plasma Membrane: A Selective Barrier
_________________________________________________,
flexible barrier known as the cell (plasma) membrane (or
lipid bilayer).
• The plasma membrane protects the ____________
________________________________________ and
helps control the materials that enter and leave.
Selective Permeability
• The plasma membrane _____________________________
________________________________________________
• ANALOGY: Fish Net
– Has holes that allow water and other things to pass
through but not the fish
Plasma Membrane
• The cell membrane is made of a double-layered
sheet called a phospholipid bilayer.
Lipid bilayer
• Phospholipid Bilayer: ________________________
__________________________________________
• Phospholipids have hydro__________ heads & hydro__________ tails
LOVE water
HATE water
•The heads LOVE the water (because they are ____________), thus are
______________________________________inside/outside of the cell.
•The tails HATE the water (because they are _________________), so
they are facing towards the ___________________________________
__________________________________________________________.
Proteins
•Proteins can form channels for ________________________
__________________________________________________
• Proteins can also form pumps to pump substances
from one side of the cell to the other using energy.
Carbohydrates
• Carbohydrates are _________________________________
at the membrane’s surface
• They act like chemical identification cards that allow cells to
__________________________________________________
______ ___________________________________________.
Carbohydrate chains
Cholesterol
• Cholesterol helps to _________________________
___________________
___________________
___________________
Fluid Mosaic Model
• ________________________________________________
in the cell membrane (and the membrane can __________
_____________) it is called the “fluid mosaic model”.