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Membrane Structure & Function - Coggle Diagram
Membrane Structure & Function
Plasma Membrane
A fluid mosaic model
Proteins are the pattern, the fluidity comes from the channels and lipids
Only allow small, non-polar, non charged molecules
Saturated fats are kinked, allow for more space
Saturated fats are tightly packed
Cholestorol
Membrane Proteins
Peripheral proteins
bound to surface of the membrane
Integral proteins
Penetrate the hydrophobic core
Transmembrane Proteins
span the entire membrane
Functions for the proteins
Transport, enzymes, signaling, cell-cell, communication, intracellular junction, and atachment
Transport Proteins
Transport Proteins
Hydrophilic tunnels/ structures that allow for movement
Channel Proteins
Hydrophilic tunnels that move ions across a membrane
Aquaporins
Carrier Proteins
Proteins that bind to molecules and carry them across a membrane
Types of transport
Passive
Does not need ATP
Movement of molecules from high concentration to low concentration
called down concentration gradient
Active
Diffusion
naturally, requires a concentration gradient)
Facilitated diffusion
natural but utilizes proteins
Osmosis
only water, a semipermeable membrane
Requires ATP
The movement of molecules from a low concentration to a high concentration.
Against the concentration gradient
Toxicity
The ability to gain or loose water
Isotonic
concentration is the same in the solution and cell
hypotonic
the cell concentration is higher in the cell and lower in the solution
Cell bursts taking on too much water
hypertonic
solution concentration is higher than inside the cell
Cells can shrivel up or pull away from the cell wall