4 Predict Question 1: Because calcium-channel blockers are negative chronotropic and negative inotropic, what e ff ect do you think increasing the concentration of calcium will have on heart rate? Your answer: negative chronotropic, negative inotropic. 1
2020-01-21, 9(19 AM PhysioEx Exercise 6 Activity 5 Page 2 of 4 Stop & Think Question Experiment Data Solution Heart Rate (beats/min) ---- 59 Calcium 69 Sodium ~ 34 Potassium ~ 28 Predict Question 2: Excess potassium outside of the cardiac cell decreases the resting potential of the plasma membrane, thus decreasing the force of contraction. What e ff ect (if any) do you think it will initially have on heart rate? Your answer: decrease heart rate. 2 Where in the cardiac muscle cell is most of the sodium normally found? Your answer: inside the cell. Correct answer: outside of the cell. 1
2020-01-21, 9(19 AM PhysioEx Exercise 6 Activity 5 Page 3 of 4 Post-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. The addition of most of the ions resulted in 1
2020-01-21, 9(19 AM PhysioEx Exercise 6 Activity 5 Page 4 of 4 Review Sheet Results You correctly answered: an erratic, decreased heart rate.
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- Fall '19
- Cindy Penney
- session ID