Term
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Definition
| Nerve Impulse. Fixed Size and Duration. |
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Term
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Definition
| Site of action potential. Present in cells capable of generating action potentials. |
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Term
| Resting Membrane Potential |
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Definition
| The difference in electrical charge across a membrane. |
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Term
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Definition
| Atoms/Molecules with a net electrical charge. |
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Term
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Definition
| Ion with a positive charge. |
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Term
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Definition
| Ion with a negative charge. |
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Term
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Definition
| A stable arrangement of polar lipids isolating the cytosol from the extracellular fluid. |
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Term
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Definition
| Bonds connecting Amino acids. Joins amino group of one to the carboxyl group of next. |
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Term
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Definition
| Proteins made of a single chain of amino acids. |
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Term
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Definition
| 4-6 Similar protein molecules that form a pore across a membrane. |
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Term
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Definition
| Property of ion channels. Specified by diamater of pore and R groups lining it. |
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Term
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Definition
| Ability for ion channels to be opened/closed by changes in the local microenvironment. |
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Term
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Definition
| Enzymes that utilize ATP to transport specific ions across the membrane. |
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Term
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Definition
| Movement of Ions from areas of high concentration to areas of low concentration. |
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Term
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Definition
| A difference in concentration levels across a membrane. |
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Term
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Definition
| Movement of electrical charge. |
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Term
| Electrical Potential / Voltage |
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Definition
| Force exerted on a charged particle. |
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Term
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Definition
| Ability for charge to move from one point to another. |
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Term
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Definition
| Relative inability for charge to migrate. |
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Term
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Definition
I=gV
V = Potential
g = Conductance
I = Current |
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Term
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Definition
| Voltage across a membrane at rest. |
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Term
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Definition
| Thin glass tube with a very fine tip. .5 um. |
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Term
| Ionic Equilibrium Potential |
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Definition
| Electrical potential difference that exactly balances the ionic concentration gradient. |
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Term
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Definition
| The difference between the real membrane potential and the equilibrium potential. |
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Term
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Definition
| Eion = 61.54/z mV log (Ion out/Ion in) |
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Term
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Definition
| Uses ATP to maintain concentration gradient of Na/K. |
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Term
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Definition
| Enzyme that actively transports Ca out of cytosol. Uses ATP. |
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Term
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Definition
| Modified version of the nernst equation. Takes into account the relative permeability of all ions. |
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Term
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Definition
| Change in a membrane from its normal resting value (-65 mV) to a less negative value. |
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Term
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Definition
| Specialization of brain capillaries that limits the movement of bloodborne substances into the extracellular fluid of the brain. |
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