chapter one cell membrane structure. chapter two membrane transport
TRANSCRIPT
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CHAPTER ONE
CELL MEMBRANE STRUCTURE
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Cell membrane
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Phospholipid molecule
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Bilayer phospholipid
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Bilayer membrane
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Fluid mosaic model
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CHAPTER TWO
MEMBRANE TRANSPORT
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Cell connection
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Molecular transport
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Cell membrane transport
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Simple diffusion
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Facilitated diffusion
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Ion channels are gated
They can also be inactivated
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Facilitated and simple diffusion
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Rate of diffusion
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Glucose transport
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Na, K-ATPase
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Active cotransport
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Na, glucose-symporter
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Active co-transport: Na, glucose-transport
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Osmosis
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Phagocytosis
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Endocytosis: pinocytosis
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Receptor mediated endocytosis
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Exocytosis
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Any questions?
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CHAPTER THREE
RESTING MEMBRANE POTENTIAL
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Nernst equilibrium potentials
Goldman equation
GHK equation
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CHAPTER FOURAction potential
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Excitable cell characterization:
- excitability
- conduction
Action potential
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Stimulus
Strength
Duration
Threshold potential
Excitation
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Strength- duration curve
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Action potential
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Voltage-gated ion channel
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Voltage-gated ion channel
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Pore- forming
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Ion channels are ion selective
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The fast Na channels ( and the slow Ca channels) have a double gating mechanism:
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K channel gating
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Action potential
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CHAPETR FOUR
SYNAPSES
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Electrical synapses
Chemical synapses:
- EPSP
- IPSP
- IP
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Chemical synapse
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Summation of synaptic inputs
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Any questions?