Download What kind of transport?

Statement of Inquiry:
DATE HERE
AGENDA
5 min
DO NOW: Answer the
following question
{Insert entrance instructions here}
For example:
1. Enter the classroom silently
and find your seat.
2. Write down homework in your
planner.
3. Do Now
4. Wait silently for instructions
Objective(s):
• (Obj 1) Summarize the main
types of passive transport
• (Obj 2) Predict the direction of
water movement into and out
of cells by passive transport.
10 min
Do Now
Objectives of the day
• (Obj 1) Summarize the
main types of passive
transport
• (Obj 2) Predict the
direction of water
movement into and out of
cells by passive transport.
Statement of Inquiry/IB Trait
STATEMENT OF INQUIRY:
The relationship between the structure and function
of our parts is one way that we define what it
means to be human.
IB TRAIT: KNOWLEDGEABLE, COMMUNICATORS
and INQUIRERS
Homework
Write definitions and either draw or provide examples for:
1. passive transport
2. concentration gradient
3. equilibrium
4. diffusion
5. osmosis
6. hypertonic solution
7. hypotonic solution
8. isotonic solution
9. ion channel
10. carrier protein
11. facilitated diffusion
Cell Membrane
• Composed of phospholipid bilayer (polar heads,
nonpolar tails) and proteins
– Integral proteins = embedded within
– Peripheral proteins = not embedded within, attached loosely to the surface
• Semi-permeable = only allows certain materials in
and out of cell
4 min
Diffusion in a beaker
What are you observing?
1 min
Passive Transport: Diffusion
• Diffusion is one of the
processes you are observing.
Diffusion works very quickly
over short distances but slowly
over long distances.
• Most of the mixing in this
demonstration is caused by
slight air currents across the
surface of the water as well as
temperature differences within
the water. This demonstration,
therefore, is more a model of
convection than an example of
actual diffusion.
8 min
Explore through Reading
1. Independently read
the text.
2. In your guided notes,
summarize your
learning in your own
words. Use complete
sentences.
2 min
Explore through Reading
1. Turn to your table
partner.
2. Discuss your answers
and finalize your
responses to the
questions.
Bring it back together!
1. What is diffusion?
2. What is facilitated diffusion?
How does it differ from
diffusion?
3. What is osmosis? Compare
and contrast diffusion and
osmosis.
4. What do diffusion,
facilitated diffusion, and
osmosis all have in
common?
Diffusion
Movement of particles from an area of high concentration to an
area of lower concentration. Requires NO energy.
Copyright © McGraw-Hill Education
Cellular Transport
Diffusion of Liquids
copyright cmassengale
13
Diffusion in a Cell
Only CERTAIN things
can diffusion in and
out of the cell.
Copyright © McGraw-Hill Education
Cellular Transport
Facilitated Diffusion
Movement of materials across the plasma membrane using proteins.
Like diffusion, facilitated diffusion requires NO energy.
Channel Proteins
Copyright © McGraw-Hill Education
Carrier Proteins
Cellular Transport
Osmosis
•
Diffusion of water across a selectively permeable membrane
Copyright © McGraw-Hill Education
Cellular Transport
Passive transport
•
Diffusion, facilitated diffusion, and osmosis DO
energy! They are all forms of
•
NOT require any
PASSIVE TRANSPORT.
They all involve the movement of particles from HIGH to LOW concentration.
Prior knowledge CFU:
What does “passive” mean?
Copyright © McGraw-Hill Education
Cellular Transport
Why does the
movement of
certain
particles
require energy,
while others
can be
passively
transported?
Cell Membrane
The cell membrane is
Protective barrier
to maintain
homeostasis
(balance)
 Regulate transport
in & out of cell
(selectively
permeable)
copyright cmassengale
Cell Membrane
The cell membrane is made of 2 layers of
phospholipids called the lipid bilayer
Cell Membrane
Polar heads of phospholipids are hydrophilic “water
loving”.
Nonpolar tails are hydrophobic “water fearing”
Makes membrane “Selective” in what crosses
21
Guided Practice
10 min
• You have 4 cards in front of you:
1.
2.
3.
4.
Diffusion
Osmosis
Facilitated diffusion
Active transport
• I will show you an example of one of these types
of transports.
• Think silently for 15 seconds.
• When I say “Fold” put up your card or cards (you
can use more than one!).
• Don’t put up your card until you get the cue!
What kind of transport?
How do you
know?
What kind of transport?
How do you
know?
What kind of transport?
How do you
know?
What kind of transport?
How do you
know?
What kind of transport?
Movement of molecules from
an area of HIGH concentration
to an area of LOW
concentration.
How do you
know?
What kind of transport?
How do you
know?
What kind of transport?
Movement of molecules from
an area of LOW concentration
to an area of HIGH
concentration.
How do you
know?
What kind of transport?
How do you
know?
1 min
Stop and Jot
• What’s the difference between passive and
active transport?
• What are the three main types of passive
transport? How are they alike? How are they
different?
Passive Transport
I. Do Now
II. Demo
III. Reading to Learn
IV. Guided Practice #1
V. Osmosis and Types of solutions
VI. Guided Practice #2
VII. Independent Practice
VIII.Exit Ticket
IX. Closing and Questions
“The advancement and diffusion of knowledge is the only guardian of true
liberty.”
– James Madison
Turn and Talk
Thinking about
what you
know about
osmosis, what
would happen
if you drank
very salty
water?
3 types of Solutions
From your reading, what are three types of solutions? What are
the differences among these types of solutions?
3 Types of
solutions
What is a “solute”?
– Hypotonic: a solution with a
comparatively lower
concentration of solutes
compared to another
– Hypertonic: a solution (e.g.
extracelllular fluid) with
higher solute concentration
compared with another.
– Isotonic: is a solution in
which the concentration is
the same as the solute
concentration of another
that is being compared.
• The words hypertonic, have the same ending,–
tonic, which is from the Greek tonos, meaning
“tension.” The prefix hyper– is from the Greek
hyper, meaning “over.” The prefix hypo– is from
the Greek hypo, meaning “lower.” The prefix iso–
is from the Greek isos, meaning “same”.
What type of solution?
__% NaCL
90% H2O
ENVIRONMENT
CELL
10% NaCL
__% H2O
What is the direction of water movement?
equilibrium
The cell is at _______________.
37
Cell in Isotonic Solution
10% NaCL
90% H2O
ENVIRONMENT
CELL
10% NaCL
90% H2O
NO NET
MOVEMENT
What happens to the size of the cell?
equilibrium
The cell is at _______________.
38
What type of solution?
10% NaCL
__% H2O
CELL
__% NaCl
80% H2O
What is the direction of water movement?
39
Cell in Hypotonic Solution
10% NaCL
90% H2O
CELL
20% NaCL
80% H2O
What happens
to the
size of the cell?
What
is the
direction
of water movement?
40
What type of solution?
15% NaCL
__% H2O
ENVIRONMENT
CELL
__% NaCL
95% H2O
What is the direction of water movement?
41
Cell in Hypertonic Solution
15% NaCL
85% H2O
ENVIRONMENT
CELL
5% NaCL
95% H2O
What is the direction of water movement?
What happens to the size of the cell?
42
Cells in Solutions
43
10 min
Guided Practice #2
1. I will show you an animal cell in a
beaker. (Not drawn to scale!)
2. On your whiteboard, answer the
question on the slide.
3. Put up your whiteboards when I
say, “Boards up!”
What type of solution is the cell in?
Will water move in or out of the cell?
Answer
What type of solution is the cell in?
Will water move in or out of the cell?
Answer
What type of solution is the cell in?
Will water move in or out of the cell?
Answer
What type of solution is the cell in?
Will water move in or out of the cell?
Answer
What type of solution is the cell in?
Will water move in or out of the cell?
Answer
What type of solution is the cell in?
Will water move in or out of the cell?
Answer
15 min
Independent Practice
• Complete the Independent Practice #1 worksheet in
your guided notes.
• Voice Level 0
Exit Ticket
8 min
Complete the exit ticket silently and stack at your
table group when you are finished.
You may pack up your things.
STOP Cards
S
T
O
P
Summarize: Summarize the day’s
lesson and what we learned.
Trait: What IB trait relates to the
lesson?
Objective: Re-state in your own
words and say whether or not we
met that objective for the day.
Purpose: What was the purpose of
this lesson?