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Catalyst #1: December 1st , 2014 (5 minutes)
1.
What part of the
cell controls what
enters and leaves
the cell?
2. Which term below
best describes the
cell membrane?
A. Impermeable
B. Selectively (semi)
permeable
C. Completely
permeable
D. Porous
3. What was your
FAVORITE thing
served at your
Thanksgiving meal?
OR What was the
best thing about
your break in
general?
Ms. M’s Thanksgiving
Break 
Agenda
• Catalyst: 5 minutes
• Introduction to the Cell Membrane: 15 minutes
• Color coding and labeling cell membrane: 15
minutes
Announcements
• Mastery grades
• DBA prizes
Objectives/Where does this fit
Objective/Review
•
• SWBAT describe the composition of the
cellular membrane as it relates to cellular
transport.
Homeostasis and the Cell
Membrane?
•What is homeostasis?
•Homeostasis is the many
processes that regulate our
bodies to maintain balance and
stability.
•Some examples?
• So, the body must keep things equal.
• Let’s zoom into the cellular level.
• “Inner Life of Cells” video
• TWO observations on your notes
Cells…
• Cells are CONSTANTLY interacting with their
environments. They have to exchange
substances with the outside environment.
• They play a major role in maintaining our
body’s homeostasis.
How do cells control
what comes in and out of
the cell?
Exit Ticket
•
Which of these describe the primary function of cell
membranes?
A. They allow certain molecules to enter and exit the
cell.
B. They allow all molecules to enter and exit the cell.
C. They do not allow molecules to enter nor exit the
cell.
D. They allow all molecules to enter the cell, but not
exit it.
•
The phospholipids of the cell membrane have two
components. Which of these parts is attracted to the
water outside the cell and the water in the cytoplasm?
A. hydrophilic heads
B. protein channels
C. hydrophobic tails
D. protein receptors
•
The tendency of organisms to maintain a
stable internal environment is called
A. cellular organization
B. homeostasis
C. metabolism
D. reproduction
Which of these is an example of homeostasis
in a multicellular organism?
A. Inheriting a gene
B. Growing larger and stronger
C. Drinking an excessive amount of sugar
water
D. Regulating body temperature