Term
| voltage-gated ion channels |
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Definition
| selectively permeable to each of the major physiological ions; respond to changes in the membrane potential |
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| ligand-gated ion channels |
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Definition
| type of ion channel that responds to chemical signals (ligands); less selective than voltage-gated |
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Term
| what is the most important of the ligand-gated ion channels in the nervous system? |
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Definition
| the class activated by binding neurotransmitters |
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| generate & maintain concentration gradients for particular ions across the plasma membrane |
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| acquire energy directly from the hydrolysis of ATP; active transporter |
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| exchange intracellular & extracellular ions; move one or more ions up its electrochemical gradient while taking another ion down its gradient |
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| carry multiple ions in the same direction; move one or more ions up its electrochemical gradient while taking another ion down its gradient |
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| a pump that generates an electrical currant that can hyperpolarize the membrane potential; ex) sodium-potassium pump |
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