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Laverty Physiology 2
Physio Test 2
Question | Answer |
---|---|
Excitatory Synapse | a synapse that when activated pushes the psn towards ap or increases freq of APs |
Inhibitory Synapse | a synapse that when activated pushes the psn away from ap or decreases freq of APs |
Convergence | many psns synapsing on one psn |
Divergance | one psn synapsing on many psns |
Ionotropic receptors | membrane protein through which ionic current is controlled by the binding of extracellular signaling molecules |
Metabotropic Receptor | membrane receptor in neurons that initiates formation of second messengers wen bound to a ligand |
EPSP | depolarizing graded potential in psn in response to activation of excitatory synapse |
IPSP | hyperpolarizing graded potential that arrises in psn in response to activation of inhibitory synapse |
Temporal summation | membrane potential produced as 2 or more inputs occurring at different times are ADDED together potential change is > that by 1 input |
Spacial Summation | adding together effects of simultaneous inputs to different places on a neuron to produce potential change > 1 input |
axo-axonic synapse | presynaptic synapse where an axon stimulates the presynaptic terminal of another axon |
presynaptic inhibition | inhibitory input to neurons through synapses at the axon terminal |
presynaptic facilitation | excitatory input to neurons through synapses at the nerve terminal |
autoreceptor | a receptor on a cell affected by a chemical messenger released from the same cell |
receptor desensitization | temporary inability of a receptor to respond to its ligand due to prior ligand binding |
agonists | antagonists |