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Neurons and excitable membranes 1

neurons-and-excitable-membranes-1

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What type of cells are neurons?

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Organise the information flow of a neuron

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The axon outputs the information
The soma processes information
Information input occurs at the dendrite

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What is the voltage charge of neurons and normal cells?

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Neurons
Cells
Potential change is caused by

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-50mV
Phopholipid bilayer insulator and Na+/K+ ATPase
-65mV

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What is the concentration of Na+ and K+ inside and outside the cell membrane?

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120mM Na+ and 5mM K+
15mM Na+ and 150mM K+
2K+ from ECF>Cytoplasm

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In the ECF
3Na+ from Cytoplasm>ECF process uses ATP > ADP + Pi
In the Cytoplasm

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What is the function of the dendrites?

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The Vm change spreads
Vm changes integrate
Transduce this to a change in Vm
The average Vm change reaches the soma
Receive a signal input

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What is the function of the soma?

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The site of production of some neurotransmitters
Vm change is transferred to the axon hillock
The site of production of proteins
contains organelles

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