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Cellular Transport How Your Cells Eat, Drink and be Merry!
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Do Your Cells Eat and Drink? Cells must take in water and nutrients in order to function. Mmm…..
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What part of the cell allows it to take in nutrients and water?
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Of What is the Cell Membrane Made? Proteins and phospholipids
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What are the Proteins in the Cell Membrane? Receptor Channel Marker
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SO….. How DO Your Cells Eat, Drink and be Merry?
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Cells move substances through the cell membrane by a process called transport Two Types of Transport: –Passive Transport –Active Transport
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What is Passive Transport? Requires no energy from cell. Molecules move from high concentration to low concentration. Molecules move with the concentration gradient.
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What’s happening?
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How would diffusion happen in a cell?
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The purpose of diffusion is to reach equilibrium
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is a type of diffusion Cell Membrane
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Osmosis is the diffusion of water from high to low concentrations across a selectively permeable membrane.
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Examples of Osmosis Negative feedback – causes plant stomata to open and close to conserve water - how it works-- water enters guard cells, making them swell and close the stoma opening
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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HELP WANTED! I’m a Channel, I can help!
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Facilitated Diffusion Passive transport that allows substances to cross the membrane with the assistance of special proteins
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Explain what is happening
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How does Passive Transport affect my cells? It allows substances to move into and out of the cell so the cell can stay in equilibrium.
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What would happen to the animal cells in each beaker? 100% Distilled Water 80% H 2 O 70% Water 30% Dissolved Substances 80% H 2 O 80% Water 20% Dissolved Substances 80% H 2 O
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Which way did the water move? 100% Distilled Water 80% H 2 O Why did the cell get so big?
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Which way did the water move? 80% Water 20% Dissolved Substances 80% H 2 O Why did the cell stay the same size?
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Which way did the water move? 70% Water 30% Dissolved Substances 80% H 2 O Why did the cell get so small?
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REVIEW 1.What part of the cell regulates what goes in and out? cell membrane 2.What are the two components of the cell membrane? proteins and phospholipids
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3.What are the two types of transport? passive and active 4.What are the characteristics of passive transport? no energy, from high to low concentration
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MORE REVIEW 1.Explain diffusion. molecules move from high to low concentration Why does it occur? to reach equilibrium
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Explain osmosis. water molecules move from high to low concentration Why does it occur? to reach equilibrium
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1.Explain facilitated diffusion. large molecules move through channel protein from high to low concentration
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What is the role of the channel protein in facilitated diffusion? allows large molecules across the membrane
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Even MORE Review! 1.What happens to an animal cell when there are more dissolved substances on the outside of the cell? 2.The inside? 3.When there are equal amounts?
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How is Active Transport different? 1.Active transport requires energy. 2.Molecules move from low concentration to high concentration 3.Molecules move against concentration gradient.
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What is this cell doing?
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Endocytosis Cells bring in large particles using cell membrane –There are 2 types: Phagocytosis Pinocytosis http://w3.uokhsc.edu/human_physiology/ATPase.htm
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Phagocytosis This is the ingestion of large particles. Your white bloods cells also do this. Amoeba
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Pinocytosis The ingestion of liquids Sometimes called “Cellular Drinking”
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Exocytosis This is how the cell gets rid of waste.
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REVIEW 1.How is Active transport different from passive? 2.What part of the cell is used to bring in particles? 3.How does a cell (including white blood cells) take in LARGE particles? 4.How does a cell take in small or liquid particles?
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Active Transport 1. Small molecules and ions are carried across membranes by proteins in the membrane that act like energy-requiring pumps.
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Molecule to be carried Molecule being carried Energy Active Transport- Protein Pumps
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