transport of molecules. concentration where is there a higher concentration of yellow dots? ab
TRANSCRIPT
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Transport of Molecules
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concentration
Where is there a higher concentration of yellow dots?A B
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Tendency for molecules to move from an area of high concentration to an area of low concentration.
A B
DIFFUSION
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Transport of Molecules
WHAT IS HAPPENING - EXPLAIN THIS TO THE PERSON SITTING NEXT TO YOU…
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Tendency for molecules to move from an area of high concentration to an area of low concentration.
DIFFUSION
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membranes act as filters.
DIFFUSION through a semi-permeable membrane
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SOLUTESOLUTE
SOLVENTSOLVENT
DIFFUSION through a semi-permeable membrane
particle that dissolves
substance in which another substance is dissolved
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Tendency for
to move from an an area of high area of high concentrationconcentration to a an area of low an area of low concentrationconcentration solution
DIFFUSION through a semipermeable membrane
moleculesmolecules
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IODINE + STARCH ->
PURPLE
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Tendency for
to move from hypertonichypertonic solution to a hypotonichypotonic solution
DIFFUSION through a semipermeable membrane
moleculesmolecules
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Hypertonic = HIGH solute concentrationcompared to “X” sideHypotonic = low solute concentration compared to “X” side
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outside
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WE HAVE BEEN MOVING SOLUTE MOLECULES…..
What is
next?
Moving the SOLVENT
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Tendency for
to move from ?????? solution to a ?????? solution
OSMOSIS through a semipermeable membrane
WATERWATER
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Tendency for WATER MOLECULES to move from hypotonichypotonic solution to a hypertonichypertonic solution
osmosis
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DIFFUSION
OSMOSIS
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think of passive transportpassive transport like going down a slide…
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think of facilitated diffusion like going down a slide… with help of proteins
going from HIGH to low requires no energy…
It just
goes!
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Still PASSIVE…. What is different?
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think of DIFFUSION like going down a slide…
Going from HIGH to low requires no energy…
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What happens in plant cells?What happens in plant cells?
OSMOSIS???
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What happens in plant cells?What happens in plant cells?
Remember, they have a CELL WALL
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What happens in plant cells?What happens in plant cells?
the pressure of the cell contents against the cell wall, in plant cells, determined by the water content of the vacuole
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What happens in plant cells?What happens in plant cells?
the pressure of the cell contents against the cell wall, in plant cells, determined by the water content of the vacuole
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Osmosis in cells w/ walls
Isotonic is not good enough!
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TURGID vs. FLACID
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with salt w/ distilled H2O
CELL WALL
CELL MEMBRANE
CELL MEMBRANE
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ISOTONIC
HY
HY
Red Blood Cells
pertonic inside the cell
potonic inside the cell
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Are these words dealing with the CELL…. Or the
SOLUTION outside the cell?
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NOT NOT PASSIVE!!PASSIVE!!
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EndocytosisEndocytosis {Endo (within) cytosis (cell) } is a process in which a substance gains entry into a cell without passing through the cell membrane. This process is subdivided into three different types:
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Active Transport = [low] to [high]
ATP
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think of active transport like going up a slide…
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think of active transport like going up a slide…
going from low to HIGH requires a lot of energy…
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think of active transport like going up a slide…
going from low to HIGH requires a lot of energy…
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phagocytosis
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Phagocytosis-cell eating
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pinocytosis-cell drinking
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exocytosis-cell vomiting
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