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P ASSIVE AND A CTIVE T RANSPORT Notes. D EMO WITH AIR FRESHENER How do you think the scent reached your nose? Was the aroma stronger at one place that.

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Presentation on theme: "P ASSIVE AND A CTIVE T RANSPORT Notes. D EMO WITH AIR FRESHENER How do you think the scent reached your nose? Was the aroma stronger at one place that."— Presentation transcript:

1 P ASSIVE AND A CTIVE T RANSPORT Notes

2 D EMO WITH AIR FRESHENER How do you think the scent reached your nose? Was the aroma stronger at one place that another? If so, why?

3 P ASSIVE T RANSPORT 3 types: Diffusion Osmosis Facilitated Diffusion

4 1. D IFFUSION Nutrients pass through cell membranes Travel down a concentration gradient (from high concentration to low concentration) no energy is required Moves until reaches equilibrium

5 D EMO FOOD COLORING

6 F OOD COLORING DEMONSTRATION Why does the food coloring travel throughout the water? http://upload.wikimedia.org/wikipedia/commons/e/eb/Diffusion.gif

7 2. O SMOSIS Diffusion of water (high concentration to low concentration)

8 A CTIVE T RANSPORT Requires energy from cells Usually larger molecules Goes against the concentration gradient (from low to high)

9 http://legacy.owensboro.kctcs.edu/GCaplan/anat/ Notes/diffusion-animated.gif http://www.indiana.edu/~phys215/lecture/lecnote s/lecgraphics/diffusion2.gif

10 P UT ON B OARD : S HOW ARROWS FOR DIFFUSION 1% sugar 5% sugar 3% sugar 1% sugar

11

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