Term
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Definition
| Neuron that detects changes in external or internal environment and sends info about them to CNS |
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Term
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Definition
| Neuron located in the CNS controls contraction of a muscle or secretion of gland. |
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Term
| Peripheral Nervous System |
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Definition
| Part of NS outside brain and spinal cord, includes nerves attached to brain and spinal cord. |
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Term
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Definition
| Cell body of neuron, contains nucleus. |
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Definition
| Junction between the terminal button of an axon and the membrane of another neuron. |
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Term
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Definition
| long, thin, cylindrical structure that conveys info from teh soma to it's terminal buttons. |
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Definition
| An active process by which substqances are propelled along microtubules that run the length of the axon. |
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Definition
| Smallest of glial cells, act as phagocytes, protect brain from invading microorganisms. |
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Term
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Definition
| The electrical charge across a cell membrane; the difference in electrical potential inside and outside the cell |
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Term
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Definition
| Movement of molecules from regions of HIGH concentration to regions of LOW concentration. |
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Term
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Definition
| Attractive force between atomic particles charged with opposite signs, or repulsive force between atomic particles charged with the same sign (like magnets). |
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Term
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Definition
| A chemical that binds with the binding site of a receptor. |
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Term
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Definition
| Small bud on teh surface of a dendrites, forms a synapse with a terminal button of another neuron. |
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Term
| Presynaptic membrane, synaptic cleft, postsynaptic membrane |
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Definition
| These make up a synapse, starting at the Terminal button, ending at the Neuron receiving the message. |
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Term
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Definition
| receptor that contains a binding site for a NT, activates an enzyme that begins a series of events that opens an ion channel elsewhere in the membrane of the cell when a molecule of the NT attaches to the binding site. |
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Term
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Definition
| protient coupled to a metabotropic receptor, conveys messages to other molecules when a ligand binds with and activates the receptor |
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Term
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Definition
| Destruction of a NT by an enzyme after release |
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Term
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Definition
| acetylcholine (ACh) is responsible for what? |
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Term
| Terminates the post-synaptic potential |
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Definition
| Acetylcholinesterase (AChE) destroys ACh (acetylcholine) and does what? |
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Term
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Definition
| the process by which inhibitory and excitatory post-synaptic potential ssummate and control the rate of firing of a neuron. |
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Term
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Definition
| A receptor molecule located on a neuron that responds to the neurotransmitter released by that neuron. |
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Term
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Definition
| If the activity of the axoaxonic synapse decreases the release of the NT, the effect is presynaptic __________; if it increases the release, it is presynaptic ________. |
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Term
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Definition
| Chemicals released by neurons that travel farther and dispersed more widely than neurotransmitters. |
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Term
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Definition
| Chain of amino acids joined by peptide bonds. Make up most neuromodulators and some hormones. |
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Term
| Soma, dendrites, axon, terminal buttons. |
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Definition
| What four things do neurons have? |
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Term
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Definition
| We have _____ - ______ synapses per neuron, _______ in childhood. |
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Term
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Definition
| Which part of the brain has more myelin than the rest? |
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Term
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Definition
| What is the threshold of excitation? |
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Term
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Definition
| Postsynaptic potentials: NA+ channels result in ______, K+ channels result in _______. |
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