Lesson Opening!!! CYSTIC FIBROSIS Currently affects more than 30,000 children and young adults in US...
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Transcript of Lesson Opening!!! CYSTIC FIBROSIS Currently affects more than 30,000 children and young adults in US...
![Page 1: Lesson Opening!!! CYSTIC FIBROSIS Currently affects more than 30,000 children and young adults in US Disrupts epithelial cells Thick, sticky mucus Difficulty.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649f435503460f94c637d5/html5/thumbnails/1.jpg)
Lesson Opening!!!
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CYSTIC FIBROSIS
Currently affects more than 30,000 children and young adults in US
Disrupts epithelial cells Thick, sticky mucus Difficulty developing
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Movement of Materials
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The Cell Membrane
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Plasma Membrane(aka Cell Membrane)
Phosopholipid Bilayer
Called the Fluid Mosaic Model
Selectively Permeable
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Selectively PermeableIf a membrane is selectively permeable only certain things can pass through
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The Cell Membrane is Selective:
Things that passively cross: Non-Polar Molecules (Alcohols, Steroids) Small Molecules (Water)
Things that actively cross: Polar Molecules (Ions) Large Molecules
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Active (requires energy)
Passive (no energy)
Types of Transport
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Osmosis
Passive
Passive Transport
Diffusion
Facilitated Diffusion
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Passive Transport
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Passive Transport
Movement of materials that DOES NOT require energy (ATP)
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What is happening here???
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DIFFUSIONThe passive movement of material from an area of high concentration to an area of low concentration
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ConcentrationThe number of a substance in a specific area
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High Concentration Low
Concentration
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Pass
ive
Tra
nspo
rt
High Concentration
Low Concentration
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Factors Affecting DiffusionConcentration—diffusion always goes
from high concentration to low concentration
Temperature—the higher the temperature, the faster diffusion occurs
Molecular Size—the bigger the molecule, the longer diffusion takes
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Osmosis
Passive
Passive Transport
Diffusion
Facilitated Diffusion
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OSMOSISThe diffusion of water through a selectively permeable membrane
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Facilitated DiffusionDiffusion that is helped by proteins in the membrane
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Facillitated Diffusion
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3 TYPES OF SOLUTIONS
These three different types of Solutions deal with Concentration Levels
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Types of Solutions
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Isotonic SolutionNo net movement of water in or out of the cell
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Isotonic:
Red Blood Cell stays the same
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Hypotonic Solution
Water moves from the solution into the cell causing it to swell or break (lysis)
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Hypotonic:
Red Blood Cell Expands
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Hypertonic Solution
The water moves out of the cell into the solution, causing the cell to shrink
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Hypertonic:
Red Blood Cell Shrinks
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Types of Solutions
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Another way to remember
Isotonic Drink – you are fine Hypotonic Drink – you bloat up Hypertonic Drink – you shrivel up
Isotonic Drink – you pee normally Hypotonic Drink – you pee all the time Hypertonic Drink – you never pee
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Explain what is
happening in this
cartoon…
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REAL LIFE TIDBIT
Reverse Osmosis “Dasani” Apply external pressure to concentrated solution
making water molecules diffuse from concentrated solution to dilute solution (leaves solutes / dirt on other side)
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Osmosis
Passive
Passive Transport
Diffusion
Facilitated Diffusion
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Osmosis
Passive
Passive Transport
Diffusion
Facilitated Diffusion
You Should now have notes for all of these. Look at the Organization of Passive Transport
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MembraneMovements
Active
Active Transport
Pumps
Endocytosis Exocytosis
Requires Energy
Sodium Potassium Pump
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Active TransportRequires Energy
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Active Transport
Movement of materials from low concentration to high concentration using a protein carrier that requires energy (costs ATP)
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Active T
ransportHigh Concentration
Low Concentration
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What is ATP again???You do not need to copy this.
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Sodium Potassium Pump
Pumps sodium out and potassium into cells Important for Action Potentials
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Active Transport
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Endocytosis
Process of bringing particles into a cell using extensions of the cellular membrane
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ENDOCYTOSIS
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Exocytosis
Process of moving particles out of a cell using extensions of the cellular membrane (how wastes are excreted from cells)
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EXOCYTOSIS
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Endocytosis y Exocytosis
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Phagocytosis
The process of membrane folding that enables cells to bring “food” into the cell
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Pinocytosis
The process of membrane folding that enables cells to bring “water” into the cell
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Did we get anything out of doing our lab???….