1/20/2020 PhysioEx Exercise 6 Activity 5 1/4 PhysioEx Lab Report Exercise 6: Cardiovascular Physiology Activity 5: Examining the Effects of Various Ions on Heart Rate Name: Saniye Secer Date: 20 January 2020 Session ID: session-59bd760f-a0dc-e1b5-3372-a27564a1aa10 Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. Experiment Results Predict Questions Stop & Think Question Which organelle in the cardiac muscle cell stores calcium? You correctly answered: sarcoplasmic reticulum. 1 Verapamil is a calcium-channel blocker. Its effects could be described as You correctly answered: negative chronotropic and negative inotropic. 2 When the cardiac muscle cell is at rest, where is most of the potassium found? You correctly answered: in the cytosol. 3 Resting cardiac muscle cells are most permeable to You correctly answered: potassium. 4 Predict Question 1: Because calcium-channel blockers are negative chronotropic and
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