Transport in Cells E7 Life Science.

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Presentation transcript:

Transport in Cells E7 Life Science

Facilitated Diffusion Transport in Cells Transport Passive Transport Simple Diffusion Facilitated Diffusion Osmosis Active Transport Direct Transport Endocytosis Exocytosis

Passive vs Active No energy input Need energy input

Passive Transport Passive transport is the movement of chemicals from high to low gradient without energy input Demo: Ink in water

Passive Transport Simple diffusion is the movement of chemicals from an area of high to low gradient Facilitated diffusion is the movement of chemicals through transport proteins embedded in the cell membrane

Passive Transport Osmosis is the movement of water through a selectively permeable membrane to equalize water concentration

Active Transport Active transport is the movement of chemicals from an area of low to high gradient through a membrane with energy input

Cytosis Endocytosis is the movement of chemicals into the cell by engulfing it with the cell membrane Exocytosis is the movement of chemicals out of the cell by expelling it through fusing of vesicles

Facilitated Diffusion Summary Simple Diffusion Facilitated Diffusion Osmosis Direct Transport Cytosis Energy No Yes Gradient High to Low Low to High Helper None Transport Protein Semipermeable membrane Vesicle Cargo Anything Water

Scientific Method A hypothesis is a proposed explanation used as a starting point for further investigation The scientific method is a systematic process to help validate theories that explain natural phenomena Yes, results support hypothesis, do more experiments Question Hypothesize Experiment Observe Conclude No, results don’t support hypothesis, change hypothesis

Cell Transport Lab Question: Hypothesis: Experiment: Observe: What will happen to the potato in different solutions? Hypothesis: Write down what might happen and why Experiment: Measure the length of the potato strips Measure the weight of the potato strips Put one in water, sugar and salt solution and note the time Observe: At 15 minute intervals, measure and weigh again Tabulate your results Conclusion: What happened and why?

Page Transport in Cells Date Question: Hypothesis: Experiment: Observe: Conclusion: