biology form-4_chapter3.. the movement of substances

1. NAME:
noR SHAFRINA BINTI MOHD NOOR
CLASS:
5 HARMONI
INCHARGE: MISS YUSNI BINTI MD YUSOFF

2. CONTENTS
The movement of substances
across the plasma membrane
• Necessity for movement of substances
across the plasma membrane
• The structure of plasma membrane
• The process of the movement of substances
across the plasma membrane

3. contents

4. Necessity for movement of substance
across the plasma membrane
 To provide nutrient for metabolism & growth
 To supply oxygen for respiration
 CO2 is produced during cell respiration
 CO2 and other waste products need to be
eliminated from the cells
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5. contents

6. The structure of plasma membrane
• The plasma membrane
is very thin and soft
• Thickness 7.0-8.0 mm
• It is a very effective
barrier
• It is made up 2 layers of
phospholipids
• Protein which are
distributed in the
plasma membrane
include:
• Pore protein
• Carrier protein
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7. The process of the movement of the
substances across the plasma membrane
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8. Transport process
Passive transport
Process which does not require
energy
• Simple diffusion
• Osmosis
• Facilitated diffusion
Active transport
Process which require energy
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9. Passive transport
The movement of particles
(molecules/ions) within a
gas or liquid across the
plasma membrane from a
region of higher
concentration to a region of
lower concentration & does
not require expenditure of
energy from ATP.
Simple diffusion
Osmosis
Facilitated diffusion
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10. Simple diffusion
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11. Simple
diffusion
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12. osmosis
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13. Facilitated diffusion
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14. Active transport
It is the movement of
substances across the
plasma membrane against
the concentration gradient
with the help of carrier
protein and the use of
cellular energy
Active transport can
only take in living
organism
The energy
provided by the
ATP
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15. Active transport
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