Parts of A Neuron
Cell processes that carry impulses toward soma.
What is Dendrites?
In certain situations ions move across this channel randomly.
What is Leakage Channels?
At rest Action potential has a membrane voltage of___?
What is -70mV?
Temporary changes in a membranes voltage depending on the characteristics and size of the stimulus.
What is Graded potentials?
Cell body of a neuron.
What is Soma?
Channels that open when the transmembrane voltage changes around them.
What is Voltage Gated Channels?
Critical level membrane potential must reach to initiate an action potential when external stimulus is applied.
What is Threshold?
Graded potential developed in dendrites of unipolar sensory neurons that influences Action potential generation on the axon of the same cell.
What is Generator Potential?
Cell processes that carries impulses away from soma.
What is Axon?
A channel that is physically opened by pressure or touch.
What is Mechanically Gated Channels?
Reversal of charges -70mv to +35mv, allowing Na+ gates to open and NA+ to enter the cell.
What is Depolarization?
Graded Potentials in membranes that result in NT release at the synapse.
What is Receptor Potential?
Lipid insulation produced by oligodendrocytes or Schwann cells.
What is Myelin?
Acytylcholine binds to a specific location on the extracellular surface of the channel protein causing this channel to open.
What is Ligand Gated Channels?
Na+ gates close and inactivate causing K+ gates to open and K+ to leave the cell.
What is Re-polarization.
What is Summation?
Gap Between Schwann cells.
What is Node of Ranveir?
This portion of the channel contains a phospholipid bi-layer with hydrophobic core containing channels that allows ions to pass through it.
What is the Cell Membrane?
Potential briefly lower than -70mv due to too much K+ being moved out.
What is Hyperpolarization?
Simultaneous stimulation of postsynaptic neuron by many presynaptic neurons.
What is Spatial Summation?