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Exocytosis

Raven Biology Chapter 5 Notes

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Biology
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Membrane biology
Cell membrane
Carrier protein
Lipid bilayer
Facilitated diffusion
Biological membrane
Fluid mosaic model
Membrane fluidity
Active transport
Membrane protein
Exocytosis
Na+/K+-ATPase

Gavin Morgan 10/9/2015 Chapter 5 2-Point Notes The fluid mosaic model shows proteins embedded in a fluid lipid bilayer: 1. The lipid layer that forms the foundation of a cell?s membranes is a bilayer formed of phospholipids. 2. Globular proteins are inserted into the lipid bilayer, with their nonpolar segments in contact with the nonpolar interior of the bilayer and their polar portions protruding out from the membrane surface. Cellular membranes consist of four component groups: 1. A eukaryotic cell contains many membranes. 2. Cell membranes are assembled from: Phospholipid bilayers, transmembrane proteins, interior protein networks, and cell-surface markers.

Membrane Structure and Function

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Biology
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Biology
Membrane biology
Cell membrane
Lipid bilayer
Membrane transport
Membrane protein
Facilitated diffusion
Biological membrane
Carrier protein
Exocytosis
Active transport
Semipermeable membrane
health

Chapter 7 Membrane Structure and Function Overview: Life at the Edge the plasma membrane is the boundary that separates the living cell from its nonliving surroundings selectively permeable: allows some substances to cross it more easily than others Concept 7.1: Cellular membranes are fluid mosaics of lipids and proteins a phospholipid is an amphipathic molecule, meaning it has both hydrophilic and hydrophobic regions head composed of phosphate group attached to one carbon of glycerol two fatty acid tails are hydrophobic in the fluid mosaic model, the membrane is a fluid structure with a ?mosaic? of various proteins embedded in or attached to a bilayer of phospholipids Membrane Models: Scientific Inquiry phospholipids are the most abundant lipid in the plasma membrane

AP Bio Unit Objectives (Chapter 8)

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Biology
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Biology
Membrane biology
Biological membrane
Passive transport
Membrane protein
Lipid bilayer
Osmosis
Active transport
Semipermeable membrane
Exocytosis
Cell membrane
Membrane transport
health

Chapter 8: Membrane structure and function Membrane Structure Membrane models have evolved to fit new data Membranes are fluid Membranes are mosaics of structure and function Membrane carbohydrates are important for cell-cell recognition Traffic across membranes A membranes molecular organization results in selective permeability Permeability of the lipid bilayer Transport proteins Passive transport is diffusion across a membrane Osmosis is the passive transport of water Cell survival depends on balancing water uptake and loss Water balance of cells without walls Water balance of cells with walls Specific proteins facilitate the passive transport of water and selected solutes Active transport is the pumping of solutes against their gradients

Endocytosis and Exocytosis

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Biology
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Biology
Cellular processes
Cell Biology
Cell membrane
Endocytosis
Receptor-mediated endocytosis
Vesicle
Clathrin
Exocytosis
Cytosis
Phagocytosis
Biological membrane

Endocytosis and Exocytosis Endocytosis is when a material is taken through the membrane by folding inwards or basically it is moving things that are outside of the cell, into the cell by extending the membrane outwards and surrounding the food particle. (General Term) Exocytosis is the reverse of endocytosis. It is the discharge of the materials from the vesicles inside the cell, to the outside of the cell. Then the vesicle joins the cell membrane. There are three types of endocytosis: Pinocytosis ? the process of taking in something that is liquid. Phagocytosis ? the process of taking something that is rather solid like fragment of an organic sell. Receptor mediated endocytosis ? Taking in specific molecules such as Low Density Lipoproteins (LDL) Receptor Mediated endocytosis
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