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Transcript
Types of Cellular Transport Passive Transport Does NOT require energy Weeee!! ! cell doesn’t use energy 1. Diffusion 2. Facilitated Diffusion 3. Osmosis high Active Transport REQUIRES ENERGY cell does use energy 1. Protein Pumps 2. Endocytosis 3. Exocytosis This is gonna be hard work!! low high low Facilitated Diffusion *Is a type of passive transport • Doesn’t require energy • Uses transport proteins to move molecules from high to low concentration 2 Facilitated Diffusion Facilitated Diffusion- is the movement of larger molecules like glucose through the cell membrane larger molecules must be “helped” Examples: Glucose or amino acids moving from blood into a cell. Facilitated diffusion • Molecules move from high solute concentration to low solute concentration through a protein channel • NO ENERGY IS NEEDED = PASSIVE TRANSPORT Types of Cellular Transport Passive Transport Does NOT require energy Weeee!! ! cell doesn’t use energy 1. Diffusion 2. Facilitated Diffusion 3. Osmosis high Active Transport REQUIRES ENERGY cell does use energy 1. Protein Pumps 2. Endocytosis 3. Exocytosis This is gonna be hard work!! low high low Active Transport • Requires Energy. • ATP (form of energy made by mitochondria). • Moves against the concentration gradient. High This is going to be hard work!! low Sodium Potassium Pump What I need to know • Active transport goes AGAINST the concentration gradient • Low solute concentration to high solute concentration https://www.youtube.com/watch?v=P -imDC1txWw Sodium Potassium Pump What I need to know • The cell uses energy (ATP) to actively transport Na+ out of the cell and K+ into the cell against the concentration gradient • For every 3 ATP used, 3 Na+ go out, and 2 K+ in https://www.youtube.com/watch?v=P -imDC1txWw • Endocytosis and Exocytosis is the mechanism by which very large molecules (such as food and wastes) get into and out of the cell • **ENERGY IS REQUIRED Food is moved into the cell by Endocytosis Wastes are moved out of the cell by Exocytosis Endocytosis Transporting material into a cell by the in folding of a membrane. Think endoThink enter To take inside of the cell 2 Types of Endocytosis • Phagocytosis- Solid particles are ingested into the cell. • Pinocytosis – liquids and very small molecules are taken into the cell. Ex: White Blood Cells, which are part of the immune system, surround and engulf bacteria by endocytosis. Endocytosis Exocytosis • Moves materials out of the cell • Think exoThink exit Moving the “Big Stuff” Exocytosismoving things out. Molecules are moved out of the cell by vesicles that fuse with the plasma membrane. This is how many hormones are secreted and how nerve cells communicate with one another. 15 Exocytosis Exocytosis vesicle immediately after fusion with plasma membrane. 16