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Ch7 Concept Map - Coggle Diagram
Ch7 Concept Map
Fluid Mosaic Model
↳ Structure
↳ Phospholipid bilayer
↳ Amphipathic proteins
↳ Glycoproteins, glycolipids
↳ Membrane Fluidity
↳ Lateral movement
↳ Unsaturated tails = more fluid
↳ Cholesterol stabilizes fluidity
↳ Protein Functions
↳ Transport
↳ Enzymatic activity
↳ Signal transduction
↳ Cell-cell recognition, joining
↳ Membrane Assembly
↳ Made in ER
↳ Modified in ER & Golgi
↳ Membranes have sidedness
Selective Permeability
↳ Membrane Function
↳ Controls substance exchange
↳ Maintains homeostasis
↳ Permeable Molecules
↳ Hydrophobic pass easily
↳ Polar/charged need transport proteins
↳ Transport Proteins
↳ Channel proteins
↳ Carrier proteins
↳ Aquaporins
↳ Water-specific channels
↳ Increase membrane permeability to water
Passive Transport
↳ Diffusion
↳ Down concentration gradient
↳ No energy required
↳ Osmosis
↳ Water diffusion
↳ Hypertonic = water leaves
↳ Hypotonic = water enters
↳ Isotonic = no net change
↳ Facilitated Diffusion
↳ Uses transport proteins
↳ Speeds passive transport
↳ Ion Channels & Carriers
↳ Ion channels: gated
↳ Carrier proteins: shape change
Active Transport & Gradients
↳ Active Transport
↳ Requires ATP
↳ Moves solutes against gradient
↳ Electrochemical Gradient
↳ Chemical (concentration)
↳ Electrical (voltage)
↳ Sodium-Potassium Pump
↳ Classic active transport example
↳ Cotransport
↳ One solute moves downhill
↳ Drives uphill transport of another
↳ Indirect use of ATP
Bulk Transport
↳ Exocytosis
↳ Vesicles fuse with membrane
↳ Release contents outside
↳ Endocytosis
↳ Takes in substances via vesicles
↳ Types of Endocytosis
↳ Phagocytosis = “cell eating”
↳ Pinocytosis = “cell drinking”
↳ Receptor-mediated = specific molecules
↳ Function of Bulk Transport
↳ Large molecule movement
↳ Maintains cell environment