Transcript 6H2O+light energy

Diffusion/Osmosis/Transport
Moving through the cell
membrane
Exchange of materials
between a cell and its environment takes
place at the cell membrane
The cell membrane controls what goes into
and out of the cell
CELL MEMBRANE
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MADE OF
PHOSPHOLIPIDS
(PHOSPHATE + FAT)
SMALL PARTICLES LIKE
WATER AND OXYGEN
CAN DIFFUSE THROUGH
EASILY BECAUSE OF
SMALL SIZE
LARGER MOLECULES MUST
TRAVEL THROUGH
“PROTEIN DOORWAYS”
IN ORDER TO LEAVE OR
ENTER THE CELL
PASSIVE TRANSPORT
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DIFFUSION( MOVEMENT) OF PARTICLES
THROUGH PROTEIN DOORWAYS
PARTICLES MOVE FROM AN AREA OF
HIGH CONCENTRATION TO AN AREA OF
LOW CONCENTRATION
NO ENERGY IS REQUIRED
ACTIVE TRANSPORT
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MOVEMENT OF PARTICLES THROUGH
PROTEINS AGAINST THE NORMAL DIRECTION
OF DIFFUSION
PARTICLES MOVE FROM LOW TO HIGH AREA
OF CONCENTRATION
ENERGY IS NEEDED FOR THIS– IT COMES
FROM THE MOLECULE ATP( STORES ENERGY
IN A FORM THAT CELLS CAN USE)
DIFFUSION
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PARTICLES NORMALLY TRAVEL FROM AREAS WHERE
THEY ARE CROWDED TO WHERE THEY ARE LESS
CROWDED
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DIFFUSION IS MOVEMENT OF PARTICLES FROM HIGH
TO LOW CONCENTRATION
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HAPPENS ACROSS CELL MEMBRANES OR OUTSIDE OF
CELLS
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NO ENERGY IS NEEDED FOR DIFFUSION TO OCCUR
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Question?????
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What happens to a red blood cell when it
is put into a salty solution?
What happens when a wilted plant is
watered?
OSMOSIS
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THE CELLS OF LIVING ORGANISMS ARE SURROUNDED
BY AND FILLED WITH FLUID MADE MOSTLY OF WATER
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THE DIFFUSION OF WATER THROUGH THE CELL
MEMBRANE IS OSMOSIS
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WATER MOVES FROM AREAS OF HIGH TO LOW
CONCENTRATION
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OSMOSIS TAKES PLACE IN DIFFERENT DIRECTIONS
DEPENDING ON THE CONCENTRATION OF WATER
SURROUNDING THE CELL
MOVING LARGE PARTICLES
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ENDOCYTOSIS
( INSIDE CELL )
THE CELL MEMBRANE
SURROUNDS A
PARTICLE AND
ENCLOSES IT IN A
VESICLE
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EXOCYTOSIS
( OUTSIDE CELL)
VESICLES FORMED
AT THE ER OR GOLGI
COMPLEX CARRY
PARTICLES TO THE
CELL MEMBRANE
Photosynthesis –
process in which
autotrophs use light
energy from the sun to
produce food.
CELL ENERGY
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PHOTOSYNTHESIS: LIGHT ENERGY,
CARBON DIOXIDE AND WATER ARE USED
TO MAKE FOOD(GLUCOSE). OXYGEN IS
RELEASED
6CO2 +6H2O+light energy  C6H12O6 +
6O2
CELLULAR RESPIRATION
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IN EUKARYOTIC CELLS THIS TAKES
PLACE AT THE MITOCHONDRIA.
FOOD(GLUCOSE) IS BROKEN DOWN INTO
CARBON DIOXIDE AND WATER AND
ENERGY IS RELEASED
C6H12O6 +6O2  6CO2 +6H2O +
ATP(ENERGY)
Respiration occurs in the
mitochondria
WHAT IS FERMENTATION?
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Fermentation is the creation of energy
without using oxygen
Example: marathon running… lactic acid
and yeast cells