do now one curve represents the diffusion of glucose through the lipid bilayer, and the other...
TRANSCRIPT
![Page 1: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/1.jpg)
Do NowOne curve represents the
diffusion of glucose through the lipid bilayer, and the other represents
the transport of glucose by facilitated diffusion. Which
curve corresponds to facilitated diffusion?
Explain your reasoning.
![Page 2: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/2.jpg)
Endocytosis
• “Endo-” means in.
• “cyto-” means cell.
• “osis” means process of.
• What does endocytosis mean?
• Endocytosis: the process by which cells take in large amounts of material, by folding in the cell membrane
![Page 3: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/3.jpg)
Endocytosis Example• Pinocytosis:
non-specific endocytosis of small amounts of extracellular fluid.
• Greek: “pino-” = “drinking”
![Page 4: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/4.jpg)
Endocytosis Example • Phagocytosis:
the endocytosis of solid particles such as bacteria, cell debris, or other solids
• Greek: “phago-” = “eating”
![Page 5: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/5.jpg)
Phagocytes
• Phagocytes, such as some types of white blood cells, engulf foreign cells by phagocytosis.
![Page 6: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/6.jpg)
For Protists, Phagocytosis = Eating
![Page 7: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/7.jpg)
Exocytosis
• Exocytosis is the same process as endocytosis, except in reverse.
• The stuff leaving may be:– Proteins released into the ECF– New lipids for expanding the membrane– Membrane proteins– Chemicals for communication, etc. (e.g. dopamine)
![Page 8: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/8.jpg)
Exocytosis
![Page 9: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/9.jpg)
![Page 10: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/10.jpg)
Endo and Exocytosis – quick review
![Page 11: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/11.jpg)
The Sodium / Potassium Pump• The Na+/K+ pump is responsible for
maintaining the electrical charge of a cell– Cells are negative
• Communication, e.g. neurons• Cation uptake
• It is an example of a membrane pump which move specific things into or out of the cell AGAINST THEIR CONCENTRATION GRADIENT.
• Since it requires energy, it is an example of ACTIVE TRANSPORT!
![Page 12: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/12.jpg)
How the Na+/K+ Pump Works
• Don’t forget the animation….
![Page 13: Do Now One curve represents the diffusion of glucose through the lipid bilayer, and the other represents the transport of glucose by facilitated diffusion](https://reader035.vdocument.in/reader035/viewer/2022062519/5697bfb61a28abf838c9dedf/html5/thumbnails/13.jpg)
Recap: Active Transport Uses ATP• Endocytosis = cell taking in material by infolding
the membrane.– Pinocytosis = “cell drinking” ECF– Phagocytosis = “cell eating” bacteria, etc.
• Exocytosis = cell exporting materials in bulk.
• Na+/K+ Pump = an example of a membrane pump that moves sodium ions out and potassium ions in AGAINST the concentration gradient. Causes cells to be negatively charged.