movement through the membrane
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Movement Through the Membrane. Mr. Luis A. Velázquez Academic Biology. Diffusion. Diffusion Motion of particle for high concentration To low concentration. This causes many substances to move across a cell membrane but does not require energy. What is Osmosis?. - PowerPoint PPT PresentationTRANSCRIPT
Movement Through the Membrane
Mr. Luis A. VelázquezBiology
Cell Membrane• The cell membrane is also known as:
–Phospholipids bi-layer–Plasma membrane–Fluid mosaic membrane
Diffusion
Diffusion Motion of particle for high concentrationTo low concentration. This causes many substances to move across a cell membrane and not require ATPenergy.
Osmosis is a type of diffusion.
The movement of water across a semi permeable membrane.
What is Osmosis?
Passive Transport• When material move from areas of high
concentration to low concentration they don’t requires energy.– Examples
•Diffusion• Facilitate Diffusion Carrier Protein•Osmosis
Particles
Water
Active Transport• When material move from areas of
low concentration to high concentration they requires energy.– Examples
• Endocytosis• Exocytosis
Endocytosis
Exocytosis
Types of Endocytosis•Phagocytosis•Pinocytosis
Phagocytosis
Pinocytosis
What can diffuse through?
• Small & nonpolar molecules can diffuse through the cell membrane•CO2
•O2
Plasma Membrane• Hydrophobic- Nonpolar Lipids• Hydrophilic - Polar Phosphate
Water is what type of molecule? Polar or nonpolar?
http://www.northland.cc.mn.us/biology/BIOLOGY1111/animations/passive1.swf
Interactive Review online