High acuity exam 1
The nurse is explaining to a patient with dysrhythmia how the heart conducts impulses that cause myocardial cells to contract simultaneously. The patient asks what structure allows this conduction from cell to cell. Which structure should the nurse mention? A) Intercalated disks B) Nuclei C) Mitochondria D) Ribosomes A) Intercalated disks A nurse is explaining to a cardiac patient how mechanical contraction takes place in the myocardial cells in the heart. The nurse should explain that which of the following is needed for contraction? Select all that apply. A) ATP B) Calcium C) ADP D) Phosphorus E) Iron F) Zinc A) ATP B) Calcium Which of the following statements is true of cell membrane depolarization? Select all that apply. A) In the resting myocardial cell, there are more potassium ions outside than inside the cell. B) In the depolarized state, the cell membrane is positively charged. C) Excitability is the term used to describe the ability of a cell to depolarize in response to a given stimulus. D) Pumps move sodium out of the cell and potassium into the cell. C) Excitability is the term used to describe the ability of a cell to depolarize in response to a given stimulus. D) Pumps move sodium out of the cell and potassium into the cell
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