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Endocytosis

Campbell9eChapter7CellStructure

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Biology
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Membrane biology
Cell membrane
Active transport
Biological membrane
Passive transport
Lipid bilayer
Endocytosis
Semipermeable membrane
Na+/K+-ATPase
Facilitated diffusion
Carrier protein
Osmosis

Membrane Structure and Function Chapter 7 Overview: Life at the Edge The plasma membrane is the boundary that separates the living cell from its surroundings The plasma membrane exhibits selective permeability, allowing some substances to cross it more easily than others ? 2011 Pearson Education, Inc. Figure 7.1 Concept 7.1: Cellular membranes are fluid mosaics of lipids and proteins Phospholipids are the most abundant lipid in the plasma membrane Phospholipids are amphipathic molecules, containing hydrophobic and hydrophilic regions The fluid mosaic model states that a membrane is a fluid structure with a ?mosaic? of various proteins embedded in it ? 2011 Pearson Education, Inc. Membrane Models: Scientific Inquiry

AP Bio Chp 7

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Biology
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Membrane biology
Cell membrane
Transport protein
Osmosis
Membrane potential
Semipermeable membrane
Biological membrane
Membrane protein
Carrier protein
Endocytosis
Turgor pressure
Passive transport

AP Reading Guide Chapter 7: Membrane Structure and Function Fred and Theresa Holtzclaw Name_______________________Period___________ Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. 2. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s, the Davson-Danielli model of membrane structure was widely accepted. Describe this model and then cite two lines of evidence that were inconsistent with it. 4. Who proposed the fluid mosaic model of membrane structure? When? Describe this model.

Cell Membranes

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Biology
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Biology
Membrane biology
Cell membrane
Lipid bilayer
Semipermeable membrane
Membrane protein
Facilitated diffusion
Carrier protein
Endocytosis
Membrane transport
Vesicle
Biological membrane
health

Cell Membranes Contents: Structure: the basics Fluid mosaic model/freeze fracture technique Membrane fluidity Membrane fluidity and cholesterol The Basics? The plasma membrane separates the living cell from its surroundings Phospholipids make up the majority of the bilayer Phospholipids consists of a hydrophilic phosphate head and two hydrophobic fatty acid tails Phospholipids are amphipathic molecules: containing both a hydrophilic and hydrophobic region The plasma membrane is described by the fluid mosaic model: The membrane is fluid with a variety of ?mosaic? proteins embedded in it The plasma membrane is selectively permeable: Small fat soluble (hydrophobic ? non polar) molecules, can enter the cell through the lipid bilayer (this occurs rapidly) e.g. hydrocarbons

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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