Download Cell Membrane Notes

Learning Target:
To understand how plant and animal cell
differ in cell organelles and the functions
of those organelles.
Learning Outcome:
I will complete the Plant and Animal Cell
Lab.
Create detailed drawing of all of what you
see, not just one cell. Identify the
following:
Animal Cell – Nucleus, Cell
Membrane, Cytoplasm and Endoplasmic
Reticulum.
Plant Cell – Cell Membrane, Cell
Wall, Chloroplast, Water Vacuole, and
Nucleus (?).
*See if the chloroplast are moving.
Learning Target:
Know the structure and function of the
cell membrane including lipid bilayer,
protein channels and pumps.
Learning Outcome:
I will complete cell membrane model.
Cell Membrane Section 7-3

Function: To regulate what enters and leaves the
cell and aids in protection and support.
1. Lipid bilayer – 2
layers
2. Proteins
Pumps
Channels
3. Carbohydrates –
attached to proteins
Act as name tags
or ID cards so cells
can recognize
each other
Learning Target:
Be able to describe the process of
osmosis as it occurs in hypertonic,
hypotonic and isotonic solutions.
Learning Outcome:
I will complete the “Observing Osmosis
Lab” write-up.
Draw a diagram that answers the
following questions:
(1)
(2)
What substances does the cell allow to
go in and out? (labeled arrows)
What substances does the cell keep in
or out (circled labels).
 Diffusion:
• The movement
of molecules
from high to low
concentration.
 Osmosis:
• The diffusion of WATER through a selectively
permeable membrane
 Isotonic
Solution:
• Equilibrium
• Water will move
both in and out
• Cell will not change
shape
 Hypertonic
Solution: (Above strength)
• Solution has a higher solute concentration than the
cell.
• Water will move out of cell
• Cell will shrink
 Hypotonic
Solution: (Below strength)
• Solution has a lower solute concentration than the cell.
• Water will move into the cell
• Cell will swell
Facilitated
Diffusion:
• Use of a protein
channel to cross
through a cell
membrane
Active Transport:
• Sometimes materials need to move in
opposite concentration gradients (low
to high)
• Requires energy
 Endocytosis (into cell)
 Phagocytosis (takes food in)
 Pinocytosis (takes water in)
 Exocytosis (out of cell)
Active Transport: Notice the energy
(ATP) required to move molecules
AGAINST the gradient!! (low to high)
Exocytosis
 https://www.youtube.com/watch?v=U9p
vm_4-bHg
Endocytosis
 https://www.youtube.com/watch?v=W6r
nhiMxtKU