Post on 03-Jun-2018
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Norhaida Bt Abu HassanD20061026400
Nur Aqilah Bt Norjandin
D20061026392
Nuraieni Bt Marwaji
D20061026398
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1.Analyzing the movement of substances
across the plasma membrane
2.Understanding the movement of substances
across the plasma membrane in everyday
life
3.Appreciating the movement of substances
across the plasma membrane
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Students already knew about:
Cell organization Cell structures and functions
The organelles
*Form 4 syllabus,Chapter 2: Cell Structures
and Organization.
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Glucose
Amino
acids
Fats Vitamins
Minarels
Water
Oxygen
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ACTIVE TRANSPORT
SIMPLE
DIFFUSION
OSMOSIS
FACILITATED
DIFFUSION
PASSIVE TRANSPORT
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PLASMA MEMBRANE
STRUCTURE
SIMPLEDIFFUSION
BRAINSTORMING
OSMOSIS
FACILITATED
DIFFUSION
ACTIVE
TRANSPORT
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Phospholipid
Phospholipid bilayer
Carrier
protein
Glycoprotein
Pore protein
Protein
Hydrophilic
head
Hydrophobictail
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Plasma membrane is arranged in a double layer
surrounding a cell and is composed of :
ProteinsPhospholipids
The hydrophilic head
(attracted to water)
A pair of hydrophobic tail
(repelled by water)
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Plasma membrane is semi-permeable
Molecules that CAN
move freely acrossplasma membrane are :
Molecules that CANNOT
move freely across plasmamembrane are:
These molecules move
across plasma membrane
in response to a
concentration gradient
(diffusion)
These substances require the aid
of transport proteins (facilitateddiffusion)
The transport proteins are:
> pore proteins
> carrier proteins
Lipid-soluble molecules
(fatty acids, glycerol)
and vitamins A, D, E, K
Small uncharged molecules
(oxygen and carbon dioxide)
Water
Large water-soluble molecules
(glucose, amino acids) and
small water-soluble inorganic
ions (K+,Na+,Ca2+)
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Vitamins
A,D,E,K
O2
Fatty
Acids
&
Glycerols
Glucose
CO2
Amino
Acids
H2
O
K+
Na+
Ca2+
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K+
Na+
Ca2+
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Glucose
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Amino
Acids
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Vitamins
A,D,E,K
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H2O
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O2
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Fatty
Acids
&
Glycerols
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CO2
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Plasma Membrane
is the net movement of molecules/ions from a
region of highconcentration to a region of
lowerconcentration.
Molecules
Concentration gradient
High concentration
Lower
concentration
occurs due to concentration gradientuntilequilibriumis achieved and the particles are
equally distributed in the system.
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BIOLOGY CHANNEL
http://localhost/var/www/apps/conversion/tmp/scratch_5/Video/Animation%20%20How%20Diffusion%20Works.swfhttp://localhost/var/www/apps/conversion/tmp/scratch_5/Video/Animation%20%20How%20Diffusion%20Works.swf8/12/2019 Movement of Substance Across the Membrane
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Gaseous exchangebetween the alveoli
& blood capillaries
(respiration)
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Gaseous
exchange
in unicellularorganism
such asAmoeba
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Net movement of water molecules from a region
of low solute concentration to a region of high solute
concentration through a semi-permeable membrane.
Semi-permeable
membrane
Water moleculesSolute molecules
Dilute solution Concentration solution
High concentration of water,
low concentration of solute
High concentration of solute,
low concentration of water
Net movement of water
Does not require any energy and water molecules move
across the phospholipid bilayer and pores in plasma
membrane
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From the diagram, we can see the water molecules
move from the region of high water concentration
on left side of beaker towards the region of lower
water concentration on right side of beaker.
THE PROCESS OF OSMOSIS
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BIOLOGY CHANNEL
http://localhost/var/www/apps/conversion/tmp/scratch_5/Video/Animation%20%20How%20Osmosis%20Works.swfhttp://localhost/var/www/apps/conversion/tmp/scratch_5/Video/Animation%20%20How%20Osmosis%20Works.swf8/12/2019 Movement of Substance Across the Membrane
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Application/Process Of The Osmosis In Life
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For food preservationUsing sugar, salt and
vinegar.
They make surroundingsolution hypertonic &
water leaves food by
osmosis.
Dehydrated food
prevents bacteria living
insideFish
Fruit
Application/Process Of The Osmosis In Life
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is the movement of hydrophilic molecules/ions across
plasma membrane with the help of protein. Energy is not
required. Carrier proteins are specific (carrier protein forglucose is only for glucose molecules only) .
Carrier protein changes its
shape to transport
molecules.
After molecule getsthrough, it resumes
its original shape to
let other similar
molecules into the
cell.
Molecule such
as glucose
moves to
binding sites of
carrier protein
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Carrier protein
changes its shape to
transport molecules.
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Application/Process of Facilitated Diffusion In Life
Nutrients absorption through the villi of small intestine
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BIOLOGY CHANNEL
http://localhost/var/www/apps/conversion/tmp/scratch_5/Video/Animation%20%20How%20Facilitated%20Diffusion%20Works.swfhttp://localhost/var/www/apps/conversion/tmp/scratch_5/Video/Animation%20%20How%20Facilitated%20Diffusion%20Works.swf8/12/2019 Movement of Substance Across the Membrane
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Plasma Membrane
Molecules
Is the movement of molecules or ions from a
region of lowerconcentration to a region of higher
concentration across plasma membrane
ATP
Requires the use of both carrier proteinsandcellular energy (ATP)to transport molecules
against concentration gradient
Such reaction is found in all animal cells(nerve and muscle cells) which is the
sodium-potassium pump
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BRAINSTORMING
QUESTION 1
QUESTION 2
QUESTION 5
QUESTION 3
QUESTION 4
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When a cell uses a protein to pass a particle
through a cell membrane is called ________.
A
B
C
Facilitated Diffusion
Osmosis
Simple Diffusion
QUESTION 1
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QUESTION 2
What is the structure X ?
X
A Pore Protein
B Phospholipid Bilayer
C Carrier Protein
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QUESTION 3
Which of the following is NOT a passive
transport process?
A
B
C
Facilitated Diffusion
Active Transport
Simple Diffusion
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QUESTION 4
This diagram above refer to what kind of
process?
A
B
C
Facilitated Diffusion
Osmosis
Simple Diffusion
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QUESTION 5
Plasma membrane is..
A
B
C
Not permeable
Permeable
Semi-permeable
BRAINSTORMING
MENU
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