Diffusion
Osmosis
Facilitated Diffusion
Pumps
Bulk Transport
YOU NEED YOUR
BOOKS!!!!
Good Morning!
Warm Up Questions: You completed these on
Wednesday with the sub. We will go over them today.
1.
2.
3.
4.
5.
Compare and contrast passive and active transport.
List the components of the cell membrane.
List the types of passive transport.
List the types of active transport.
Describe how the structure of the cell membrane is
related to its function.
Today:
1.
2.
3.
Complete review notes
Video
Class work
Good Afternoon!
Warm Up:
Below are three pictures of animal cells in a solution. Draw these in
your notebook then label each SOLUTION as one of the following:
hypertonic, hypotonic, isotonic
A.
_________________
B.
__________________
C.
_________________
Cell Transport
Passive Transport
Active Transport
(no energy)
(energy)
Facilitated
Diffusion
Diffusion
Osmosis
Pumps
Exocytosis
Endocytosis
Pinocytosis
Phagocytosis
Direction
Transport
Mechanism
Energy
Required?
Examples of
Particles
Diffusion
Osmosis
Facilitated
Diffusion
Pumps
Endocytosis
/ Exocytosis
High to
Low
High to
Low
High to
Low
Low to
High
N/A
Pores
Pores
Channels
Pumps
Yes
No
No
No
CO2
H2 O
Glucose
O2
Ions
Membrane
Yes
Food,
Waste
VOCAB
_____________
SOLUTE
= substance that is
dissolved in a solvent to make a solution
SOLVENT = substance in which a
_____________
solute is dissolved
EX:
Koolaid powder = solute
Water = solvent
Koolaid drink = solution
http://www.makash.ac.il/h_school/hst/hstsb/chem/luach/dissolve.jpg
Images by Riedell
__________________
CONCENTRATION = mass of
a solute in a given volume of
solution
MORE molecules there are in a given
The _______
volume the ____________the
concentration
GREATER
What if there is a difference in
concentration but solute
molecules can’t move across a
membrane?
WATER will move
until concentration
reaches equilibrium
Cell in Hypertonic Solution
15% NaCL
85% H2O
ENVIRONMENT
CELL
5% NaCL
95% H2O
What is the direction of water movement?
Out of the Cell
Cell in Hypotonic Solution
10% NaCL
90% H2O
CELL
20% NaCL
80% H2O
What is the direction of water movement?
Into the cell
Cell in Isotonic Solution
10% NaCL
90% H2O
ENVIRONMENT
CELL
10% NaCL
90% H2O
NO NET
MOVEMENT
What is the direction of water movement?
equilibrium
The cell is at _______________.
Isotonic Solution
NO NET
MOVEMENT OF
H2O (equal amounts
entering & leaving)
Hypotonic
Solution
Cell Swells &
may burst
Hypertonic
Solution
Cell shrivels up
Animal cells
http://www.stchs.org/science/courses/sbioa/metenergy/bloodcells.gif
Animation
Osmosis in Red Blood Cells
Isotonic
Hypotonic
Hypertonic
hypotonic
hypertonic
isotonic
hypertonic
isotonic
hypotonic
Plasmolysis Lab
16. List the term that refers to a plant cell in
a hypertonic solution that has lost water,
resulting in the cell membrane shrinking
away from the cell wall.
Warm Up
Please write the following questions in your
notebook.
1. Some peeled pieces of apple were placed in distilled
water and some in very salty water. What will the cells
in the apple pieces do in these two solutions?
2. What happens to plant cells when they are in hypertonic
solutions?
3. Why do you get thirsty when you eat salty potato chips?
Name the solution
(hypotonic, hypertonic, isotonic)
16. .
18.
17.
19.
20. Define crenation.
Active Transport
Moving molecules across the cell membrane
from LOW to HIGH concentration.
Endocytosis and Exocytosis
1.
2.
3.
4.
Large food particles are engulfed by a cell.
A vesicle forms around the food.
The vesicle fuses with a lysosome which digests the food.
Waste products are excreted when the vesicle fuses with the cell
membrane.
Phagocytosis vs. Pinocytosis
1. Phagocytosis- engulfing LARGE particles
2. Pinocytosis- engulfing small particles and
water, “cell drinking”
Osmosis of Water through a
Cell Membrane
Draw a visual representation of the effect on
a cell placed in a hypertonic, hypotonic,
and isotonic solution.
th
5
Period
• You will need all of your Cell notes!
Good Afternoon!
Warm Up:
Below are three pictures of animal cells in a solution. Draw these in
your notebook then label each SOLUTION as one of the following:
hypertonic, hypotonic, isotonic
A.
_________________
B.
__________________
C.
_________________
Isotonic Solution
NO NET
MOVEMENT OF
H2O (equal amounts
entering & leaving)
Hypotonic
Solution
Cell Swells &
may burst
Hypertonic
Solution
Cell shrivels up
Endocytosis and Exocytosis
1.
2.
3.
4.
Large food particles are engulfed by a cell.
A vesicle forms around the food.
The vesicle fuses with a lysosome which digests the food.
Waste products are excreted when the vesicle fuses with the cell
membrane.
Phagocytosis vs. Pinocytosis
1. Phagocytosis- engulfing LARGE particles
2. Pinocytosis- engulfing small particles and
water, “cell drinking”
Plant Cells
Cell Wall and
vacuole are
very important!
Osmosis in Plant Cells
What makes Plant cells different from
Animal Cells?
1. Chloroplasts
2. Large Vacuole (to store water)
3. Cell Wall (protection from environment)
What happens to plant cells in different
solutions?
–
–
–
Isotonic- no change in the cell
Hypotonic- water is collected in the vacuole (creates
TURGOR Pressure) **DOES NOT BURST
Hypertonic- cell membrane detaches from the cell
wall as water leaves the cell
Turgor
Plasmolysis
Turgor Pressure
• The pressure exerted
on the cell wall from
water collected in the
vacuole
• Occurs in hypotonic
environments
http://sun.menloschool.org/~dspence/biology/chapt
er6/chapt6_10.html
Monday
• QUIZ
– Notes, homework sheet, review sheet
Can you see plant cells
gaining or losing water under
a microscope?
Let’s take a look!
Let’s Review!
Animal
Plant
Isotonic
Hypotonic
Hypertonic
http://faculty.northseattle.edu/esmith/012004.htm#slide0103.htm
Is the cell membrane of an
animal cell and a plant cell
permeable to every
molecule?
Diffusion in Action
www.biologyjunction.com
Test Review!
1. Distinguish between the two types of cells.
2. What type of cell are bacteria?
3. Describe the function of the following organelles:
– Ribosomes
– Golgi Bodies
– Endoplasmic Reticulum
– Nucleus
– Cytoskeleton
4. Why is the cell membrane said to be semi-permeable?
5. List the three types of passive transport as well as active transport.
6. Molecules move from areas of _____ concentration to _____
concentration.
7. Glucose moves through the cell membrane through what type of
transport?
1.
2.
3.
4.
Cell Transport Test Part A
Plasmolysis- fancy
word for the plant
cell losing water