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neuroanatomy --> cells

Terms in this set (39)

how does calcium imaging work
flashes of light reflect influxes of calcium into each neuron
what are the two ways that neurons can signal other neurons
chemically and electrically
what are dendrites
the projects that go out from the cell bodies, where information is input
what is the axon hillock
where the axon comes out of the cell body, where the axon is most sensitive
what are the exposed parts of the axon called
nodes of ranvier
what is the importance of the phospholigpid bilayer
it limits movement between the intracellular and extraceullar space, controls what goes in and out
______ __________ are proteins that allow movement of ions across the bilayer
ion channels
what four ions are essential to the functioning ofa. healthy nueron
K+ Na+ Ca2+ Cl-
what are passive channels
channels that are open all the time where sodium and potassium can enter or exit
what are ligand gated channels
they are closed under rest conditions and when a ligand binds to them they open up
what are voltage gated channels
they are closed at rest and open when the membrane potential reaches a sufficient voltage
describe what the sodium potassium pump does
it brings in 2 potassium ions for every 3 sodium ions that it removes
there are more potassium ions __________ the cell and more sodium ions _____________ the cell
inside, outside
how does the sodium potassium pump create an electrical gradient
the neuron has a net loss of positive charge which makes the inside more negative than the outside
describe teh chemical gradient of potassium
potassium wants to move out of the cell because there is a ton of it inside the cell
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