mani
Forum Guru
Topics: 104
Posts: 1,403
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1 stage 4 depolarization
2 symp stimulation----> inc heart rate and force of contraction, also increased erythropoitin
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| Dragonfly
Forum Elite
Topics: 25
Posts: 333
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1. it is due to a inward Na current otherwise known as "Funny Current".
2. inc. Renin production, inc. HR+CO of heart and inc. 2,3BPG in RBCs
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| docET
Forum Newbie
Topics: 6
Posts: 14
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Dragonfly ur rite just to add to q2 the resting membrane potential of SA node is -60 to -70 which is not enough to keep the Na channels closed.
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