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MEMBRANE STRUCTURE AND FUNCTION - Coggle Diagram
MEMBRANE STRUCTURE AND FUNCTION
Plasma Membrane
surrounds all cells
selectively permeable
made of
proteins
carbohydrates
phospholipids
Transport
Exocytosis
releases contents out
Endocytosis
Pinocytosis
Receptor-mediated
Phagocytocis
Tonicity
hypotonic
cell swells when water enters
hypertonic
cell shrinks when water exits
isotonic
no water flow
Fluid Mosaic Model
fluid membrane
cholesterol
phospholipid bilayer
hydrophilic heads
hydrophobic tails
Passive Transport
Diffusion
moves from high to low concentration
Osmosis
waters goes towards high solute
Faciliated diffusion
uses transport proteins
Active Transport
uses carrier proteins
moves against gradient
requires ATP
Membrane functions
proteins
carrier proteins
functions
enzymatic activity
signal transduction
transport
cell-cell recognition
intercellular joining
attached to cytoskeleton and ECM
transport proteins
channel proteins
Co-transport
active transport indirectly drives transport of other substances
Membrane potential
voltage across a membrane
electrical potential difference
created by uneven ion distribution