Term
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Definition
| adrenaline (epinephrine, norepinephrine) |
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Definition
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| How are transmitters released |
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Definition
| Voltage gated calcium channels in axon terminal are open and calcium triggers exocytosis of neurotransmitters vesicles from their respective neurons |
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Term
| How might the activity of a neurotransmitter be terminated |
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Definition
| GABA firing acts as inhibitory by opening potassium or chloride and calcium channels are closed. Both presynaptic and postsynaptic inhibition. |
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Term
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Definition
| stimulus capable of depolarizing membrane but not by enough to reach threshold |
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Definition
| stimulus that has more than enough depolarization to reach threshold |
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Term
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Definition
| Have sites for receptors to attach to which can limit the neurotransmitter being released |
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Term
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Definition
| anatomically specialized junction between 2 neurons where electrical activity in one neuron influences excitability of second. |
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Term
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Definition
| cellular structure that holds and releases neurotransmitter at the synapse |
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Definition
| narrow extracellular space separating pre and post synaptic neurons at chemical synapses |
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Term
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Definition
| excitatory postsynaptic potential: depolarizing graded potential in postsynaptic neuron in response to activation of excitatory synapse |
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Term
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Definition
| inhibitory postsynaptic potential: hyperpolarizing graded potential that arises in postsynaptic neuron in response to activation of inhibitory synaptic endings upon it |
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Term
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Definition
| Neurotransmitter- low. Neuromodulator-varies but tends to be high |
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Term
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Definition
| neurotrasmitter is msec to sec. neuromodulator is minutes to hrs |
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Term
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Definition
| Neurotransmitter is from firing of neuron. Neuromodulator is from neurons and other cells (paracrine) |
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Term
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Definition
| Neurotransmitter is EPSP, IPSP, or intraceullular biochemical reaction. Neuromodulator influences response of neurotransmitter via channels, qty/activity of 2nd messenger, amount of neurotransmitter. |
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Term
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Definition
| one presynaptic neuron fires very rapidly, builds up |
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Term
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Definition
| several neurons fire at same time |
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Term
| Temporal and spatial summation |
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Definition
| Necessary in order to produce a great enough stimulus to reach action potential |
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Definition
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Definition
| aromatic rings with alcohol and amine group. |
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Term
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Definition
| aromatic rings with alcohol and amine group. Methyl group attached to the nitrogen. |
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