Bl 5 Using the Diagram belew Answer Questions 4600 100 200 100 t. This Diagram r

Question

Bl 5 Using the Diagram belew Answer Questions 4600 100 200 100 t. This Diagram represents an Aetion Potential found only in this type of Cell a Autorythmie b Pacemaker e. Gardiae Contrac tile d Pukingee e. Both Pacemaker and Cardiac Contractile 52. Fast electrically gated Sedium Channels open depolarizing the cell 53. This is the "Plateau" 54. Galeium Channels close and Potassium channels open 55. RMP 56. The entry of this Cation initiates Calcium release (from the SR) followed by cardiac contraction d. Cl e. Both + and K+ 57-62 Choose from the list below the effect each variable will have on Cardiac Output A CO Increases B CO Decreases C CO Remains the same 57 EDV increases and ESV decreases 5a EDV remains unchanged and ESV increases 59. Heart Rate increases 60 Afterload increases 61 Prelead increases 62. Contractility Increases

Explanation / Answer

51) The action potential given in the diagram has a steady plateau phase before repolarisation phase. This is a characteristic feature of cardiac contractile cells in the ventricles of heart. Therefore, the answer for this question is option c (cardiac contractile cells).

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