cell transport chap. 7-3
TRANSCRIPT
![Page 1: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/1.jpg)
Cell TransportCell Transportchap. 7-3chap. 7-3
https://www.pinterest.com/pin/225039312606126463/
![Page 2: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/2.jpg)
I. Cell MembraneI. Cell Membrane1) POLAR ends face INSIDE & OUTSIDE cell [where water is]
2) NONPOLAR tails face each other inside bilayer [to avoid water]
![Page 3: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/3.jpg)
Outsideof cell
Insideof cell(cytoplasm)
Cellmembrane
Proteins
Proteinchannel
Lipid bilayer
Carbohydratechains
![Page 4: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/4.jpg)
http://www.bioteach.ubc.ca/Bio-industry/Inex/
![Page 5: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/5.jpg)
3) FUNCTION: SELECTIVE PERMEABILITY = allows only certain materials to go into & out of cell
![Page 6: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/6.jpg)
a. Why doesn’t the cell membrane let everything through?
HOMEOSTASIS!- Cells maintain a stable environment by controlling what enters & leaves.
![Page 7: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/7.jpg)
II. Cellular Transport – Two II. Cellular Transport – Two Major Types (Passive & Major Types (Passive & Active Transport)Active Transport)1.Passive Transport = moves molecules across cell mem. using NO ENERGY
Movement going with the concentration gradient (normal flow)
![Page 8: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/8.jpg)
1.Diffusion – molecules move from HIGH conc. to LOW conc.
a. Small molecules: O2, CO2
b. Slow process
A. Types of Passive Transport
![Page 9: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/9.jpg)
![Page 10: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/10.jpg)
Passive Transport Video Cliphttps://www.pinterest.com/pin/
225039312606104881/
![Page 11: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/11.jpg)
![Page 12: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/12.jpg)
PROBLEM for PROBLEM for Cells?Cells?
Cell Cell membranes membranes areareSELECTIVELY SELECTIVELY PERMEABLEPERMEABLE
![Page 13: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/13.jpg)
2. Facilitated Diffusion – movement of molecules with help of a carrier protein
![Page 14: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/14.jpg)
![Page 15: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/15.jpg)
a.Moves large molecules
like Glucose and Fructose (C6H12O6)
b. Faster than diffusion
![Page 16: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/16.jpg)
http://www.sirinet.net/~jgjohnso/homeostasis.html
![Page 17: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/17.jpg)
![Page 18: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/18.jpg)
3. Osmosis – diffusion of WATER across cell membrane
* H2O moves to area with LESS WATER
![Page 19: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/19.jpg)
a. Direction of Osmosis:1) Hypotonic Solution = H2O moves INTO cell & CELL EXPANDS
![Page 20: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/20.jpg)
2) Hypertonic Solution = H2O moves OUT OF cell & CELL SHRINKS
![Page 21: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/21.jpg)
3) Isotonic Solution = H2O moves INTO & OUT OF cell & cell stays NORMAL SIZE
![Page 22: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/22.jpg)
![Page 23: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/23.jpg)
* EQUILIBRIUM = concentration of molecules is same everywhere
* Molecules never stop moving – even at equilibrium
![Page 24: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/24.jpg)
2. 2nd Type of Transport Active Transport
1. moves molecules across cell membrane using ENERGY
![Page 25: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/25.jpg)
B. Types of Active Transport
1. Transport Proteins: in membrane- move substances from low to high conc. (opposite of how it wants to move)
![Page 26: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/26.jpg)
2. Endocytosis = cell surrounds & ingests materials from OUTSIDE to INSIDE cell using VESICLES
![Page 27: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/27.jpg)
http://www.sirinet.net/~jgjohnso/homeostasis.html
![Page 28: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/28.jpg)
a. Steps:1) membrane folds in & forms pocket2) Pocket closes & pinches off in cell vesicle 3) vesicle fuses w/ organelles to release contents
![Page 29: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/29.jpg)
b. Two Types of Endocytosis:1)Phagocytosis – LARGE particles (food) or whole CELLS (bacteria) into cell
2) Pinocytosis – large amounts of liquids/ fluids into cell
![Page 30: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/30.jpg)
3. Exocytosis –releases large amounts of material to the OUTSIDE of the cell using VESICLES
![Page 31: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/31.jpg)
a. Steps:1)Vesicle forms, travels to & fuses w/ cell mem.
2)Vesicle opens to outside & releases contents
![Page 32: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/32.jpg)
http://www.sirinet.net/~jgjohnso/homeostasis.html
![Page 33: Cell Transport chap. 7-3](https://reader035.vdocuments.net/reader035/viewer/2022062806/5697bfb91a28abf838c9ff70/html5/thumbnails/33.jpg)
Video clip