Flashcards
280 - Myocardial Action Potential (add)
Cards in this deck (20)
- 1Describe Phase 0rapid upstroke and depolarization—voltage-gated Na+ channels open
- 2Describe Phase 1initial repolarization—inactivation of voltage-gated Na+ channels. Voltage-gated K+ channels begin to open.
- 3Describe Phase 2plateau—Ca2+ influx through voltage-gated Ca2+ channels balances K+ efflux. Ca2+ influx triggers Ca2+ release from sarcoplasmic reticulum and myocyte contraction.
- 4Describe Phase 3rapid repolarization—massive K+ efflux due to opening of voltage-gated slow K+
channels and closure of voltage-gated Ca2+ channels. - 5Describe Phase 4resting potential—high K+ permeability through K+ channels
- 6During Phase 0, there is rapid _________ and _________Rapid upstroke and depolarization
- 7During Phase 0, voltage-gated NA+ channels _________Open
- 8During Phase 1, there is _________ of voltage gated Na+ channels.Inactivation
- 9During Phase 1, voltage-gated _________ begin to openK+ channels
- 10During Phase 2, Ca2+ influx through voltage-gated Ca2+ channels balances _________K+ efflux
- 11During phase 2, _________ influx triggers Ca2+ release from sarcoplasmic reticulum and myocyte contraction.Ca2+
- 12During phase 2, Ca2+ influx triggers Ca2+ release from _________ _________ and _________ _________Sarcoplasmic reticulum and myocyte contraction
- 13During phase 3, massive _________ due to opening of voltage-gated slow K+ channels and closure of voltage-gated Ca2+ channels.K+ efflux
- 14During phase 3, massive K+ efflux due to opening of voltage-gated slow K+ channels and closure of _________Voltage-gated Ca2+ channels
- 15During phase 4, high K+ permeability through _________K+ channels
- 16Cardiac muscle action potential has a plateau which is due to what?Cardiac muscle action potential has a plateau, which is due to Ca2+ influx and K+ efflux.
- 17Cardiac muscle contraction requires what to induce Ca2+ release from sarcoplasmic reticulum (Ca2+-induced Ca2+ release)?Cardiac muscle contraction requires Ca2+ influx from ECF to induce Ca2+ release from sarcoplasmic reticulum (Ca2+-induced Ca2+ release).
- 18Cardiac muscle contraction requires Ca2+ influx from ECF to induce what?Cardiac muscle contraction requires Ca2+ influx from ECF to induce Ca2+ release from sarcoplasmic reticulum (Ca2+-induced Ca2+ release).
- 19Cardiac myocytes are electrically coupled to each other by what?Cardiac myocytes are electrically coupled to each other by gap junctions.
- 20What are electrically coupled to each other by gap junctions?Cardiac myocytes are electrically coupled to each other by gap junctions.
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- User has deleted their subject information Flashcards on 280 - Myocardial Action Potential (add), created by Deleted user on 30/05/2017.
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- Deleted user · May 2017
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- May 30, 2017
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- Created by Victoria Wright · May 30, 2017
- Copied by Victoria Wright · May 30, 2017
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