crossing the cell membrane
DESCRIPTION
Crossing the Cell Membrane. Osmosis Active Transport Passive transport Diffusion Endo/ Exo - Cytosis. Warm Up Questions:. All _______________ are composed of cells. New cells are produced from _________________. What is the main purpose of the cell membrane? - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/1.jpg)
Crossing the Cell Membrane
OsmosisActive Transport
Passive transport DiffusionEndo/Exo - Cytosis
![Page 2: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/2.jpg)
Warm Up Questions:1. All _______________ are composed of cells.
2. New cells are produced from _________________.
3. What is the main purpose of the cell membrane?
4. What are some examples of manmade membranes? (Try to think of at least two.)
![Page 3: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/3.jpg)
Cell MembranesMade up of a lipid bi-layer
Selectively Permeable: Not all particles can pass through the membrane without help from special membrane proteins
![Page 4: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/4.jpg)
Active TransportThe process by which proteins on the cell
membrane push particles from one side of the membrane to the otherRequires energy (ATP)
Occurs when particles are two large to diffuse through a membrane or;
Occurs when particles are moving against the forces of diffusion (Particles are moving from an area of low concentration to an area of high concentration)
![Page 5: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/5.jpg)
Active Transport
H2O
H2O
H2O
H2O
H2O
H2O
H2O
H2O
H2O
H2O
H2O
A B
Na+
Na+
Na+
Na+
![Page 6: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/6.jpg)
Active Transport
![Page 7: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/7.jpg)
Active Transport
![Page 8: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/8.jpg)
Passive TransportNormal Diffusion that requires membrane proteins
Channel ProteinsCarrier Proteins
![Page 9: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/9.jpg)
EndocytosisEndocytosis is the process by which nutrients are
engulfed by the cell membrane
![Page 10: Crossing the Cell Membrane](https://reader036.vdocuments.us/reader036/viewer/2022062305/56815f30550346895dcdfe8b/html5/thumbnails/10.jpg)
ExocytosisThe process by which a vesicle inside the cell
fuses with the cell membrane and expels its contents outside the cell