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Cellular Transport Notes
Essential
How and why is the plasma membrane (structure & function) essential in
Question.
maintaining the homeostasis for the cell in reference to transport, hypertonic
solutions, hypotonic solutions, and isotonic solutions? Cells in hypotonic solutions
swell as water moves across the membrane into the cell, Isotonic solutions have
equal (iso-) concentrations of substances.
Activating Strategy:
Scenario
Predicted Outcome
Observed Outcome
It will soak up the juice.
Correct
It will reform back into a
Correct
Strawberries with sugar.
Raisins in water.
grape or soak up the juice
from the water.
What controls movement in and out of the cell? Surrounds and contains the cells
contents
-The plasma membrane: ________________________________________.
-It controls what enters and leaves the cell.
-It is composed of a double -layer of phospholipids and proteins
Lipids are hydrophobic which means they don’t mix with water Phosopholipids in the
membrane are ______________ meaning they can __________.
It is a semi-permeable membrane meaning it ________________________________.
Type of solution
What is it?
How does it move?
What happens to
the cell placed in
this solution?
Hypertonic
More salute outside Outside the cell
shrink
the cell than inside
the cell
Hypotonic
More salute inside
Insdie the cell
swekk
Isotonic
Movement of water nothing
Equal
is equal
concentration of
solitude inside and
outside yhr cel
A cell that is too hypertonic will shrink
A cell that is too hypotonic will explode
What does transport mean? Movement of something
There are 2 types of transport.
What are the two types of transport?
a. passive
b. active
Passive Transport is the movement of molecules through the plasma membrane with no
energy
In this case particles move down the concentration gradient.
High number to a low _ number
Facilitated diffusion is the transfer of materials across the plasma membrane using
transport _channell___________ proteins form channels allowing specific molecules to
flow through.
Carrier proteins change shape to allow a substance to pass through the plasma
membrane.
Channel Proteins (describe and draw it):
Carrier Proteins (describe and draw it):
_____________ is referred to as the movement of any molecule across the plasma
membrane with the concentration gradient.
_____________ is referred to the movement of H2O across the plasma membrane with
the concentration gradient.
Active Transport is the movement of molecules through the plasma membrane
__________ the concentration gradient.
____________ Energy!
__________ number to a __________ number
Uses ___________ proteins to move particles against the concentration gradient.
What are carrier proteins again?
Type of
transport
Simple
diffusion
Facilitated
diffusion
Active
transport
Transport
protein used
No
Yes,channel
and or carrier
proteins
Yes carrier
proteins
Direction of
movement
Down the
concentration
gradient
Down the
concentration
gradient
Against the
concentration
gradient
Requires
energy input
from cell
No
Classification
of transport
No
passive
passive
active
Yes
Endocytosis the cell surrounds and ___________ material from the environment. Large
particles (___________)
Exocytosis the cell ___________ materials from the cell to the environment. Large
particles (___________)
Assesment Prompt:
Explain what happened to the strawberry and the raisin from the activating strategy.
Remember to use the terms we have learned and discussed during the lecture.
Strawberry w/sugar:
Raisins in water: