Flashcards
Neural Conduction and Synaptic Transmission
Cards in this deck (17)
- 1Membrane Potentialdifference in electrical charge between inside and outside of a cell
- 2Resting Potential-70 m V - resting state of polarized neuron
- 3Sodium-Potassium PumpMechanisims in the cell membrane that exchange 3 sodium (NA+) ions inside the neuron for two potassium (K+) outside the neuron.
- 4DepolariseDecrease the resting membrane potential
- 5Excitatory Postsynaptic Potentials (EPSPs)depolarisation that increases the likelihood that the neuron will fire
- 6Inhibitory Postsynaptic Potentials (IPSPs)Decrease the likelihood that the neuron will fire
- 7DecrementalSignals decrease in amplitude as they travel through the neuron
- 8Threshold of excitationif the sum of depolarizations reaches a certain point, an action potential will occur
- 9Action PotentialReversal of membrane potential(from about -70 to +50mV)
All or none responses - 10Intergrationcombining a number of individual signals into one overall signal over space and time
- 11Voltage-Activated ion channelschannels that open up in response to changes in the level of membrane potential
- 12Absolute Refractory PeriodImmediately after the initiation of an action potential, there is a period in which another action potential cannot be initated
- 13Axodentritic SynapsesSynapses of axon terminal buttons on dendrites
- 14NeuropeptidesLarge neurotransmitters that are short proteins
- 15LigandAny molecule that binds to another
Neurtrasmitter is a ligand to its receptor - 16Receptor SubtypesThere are various types of receptors to which a neurotransmitter can bind to
- 17Ionotropic ReceptorsLigand-activated ion channels