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13 Cards in this Set
- Front
- Back
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Vagus nerve does what to slow SA? |
Increase potassium permeability |
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Catecholamine does what to hr |
Increases from sympathetic |
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Increase in ca permeability by L channel (long channel in heart muscle) is the effect of |
Chatecholamine shortens prepotential cat's are fast |
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Rate of beating when things messed up |
SA 100 Sa and brain 60 Av 50 bundle of his 49 |
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Where does ca come from in skeletal and cardiac muscle, smooth |
Skeletal SR and cardiac ECF, smooth ECF |
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Where does ca bind in smooth muscle? |
Myosin head atp to adp, slow long lasting movement |
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300mOsm is what |
Isotonic |
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At rest increasingly sodium concentration does what? |
Nothing it doesn't have the permeability to change anything, it makes the action potential higher |
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Sodium inactivation gates do what |
Prevent the charge from heading back the other way during refractory periods |
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How fast do activation gates open? |
Fast |
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Why does action potential change in cardiac muscle |
Calcium comes in with sodium from ECF |
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What hormone is teased by sympathetic into the capillaries? |
Epinephrine, norepinephrine is at target organs |
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Agonist and antagonist to ach at somatic motor end plate |
Nicotine and curare |
