Term
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Definition
| Cell that delivers the message |
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Term
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Definition
| cell that receives the information |
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Term
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Definition
| the tiny space between the presynaptic cell and the post synaptic cell in a chemical synapse, across which neurotransmitters diffuse into. |
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Term
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Definition
| chemical released by neurons that affects other neurons |
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Term
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Definition
| a structure on the surface of the cell that selectively receives and binds a specific substance |
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Term
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Definition
| tiny, nearly spherical packets near the axon terminals filled with the neurotransmitter |
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Term
| What happens at a synapse? |
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Definition
| At a chemical synapse neurotransmitters are released and diffuse across the synaptic cleft, bind receptors and include a current in the post synaptic cell. |
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Term
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Definition
| when ligands bind to the channel receptors, the pore of the channel opens allowing charged ions to flow through the channel. |
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Term
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Definition
| for a single larger molecule or receptor site, any member of the smaller molecules, or ions that are able to bind with the larger molecule or site. |
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Term
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Definition
-In the membrane
-Controls sodium(+) entry |
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Term
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Definition
| the neurotransmitter opens sodium (Na+) channels, a slight depolarization of the receiving neuron occurs because of the movement of the positively charged Na+ ions into the cell |
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Term
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Definition
| the neurotransmitter hyper polarizes the postsynaptic membrane. It increases the negative charge within the cell, moving it further from the threshold and decreasing the probability of an action potential |
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Term
Excitatory postsynaptic potential
(+ ions) |
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Definition
| a temporary depolarization of postsynaptic membrane potential caused by the flow of positively charged ions into the postsynaptic cell as a result of ligand-sensitive channels |
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Term
| Inhibitory postsynaptic potential |
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Definition
| a synaptic potential that decreases the chance that a future action potential will occur is a postsynaptic neuron |
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Term
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Definition
| occurs when 2 or more action potentials (nerve impulses) arrive in rapid succession along a single pre-synaptic neuron. |
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Term
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Definition
| occurs when 2 or more separate inputs almost simultaneously from different pre-snyaptic neurons |
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Term
| What causes neurotransmitter release from an axon terminal? |
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Definition
| the opening of ion channels |
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