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BIO202_MH_V3  Topic 2: Cardiovascular System: The Heart

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CARDIOVASCULAR SYSTEM: THE HEART QUIZGUIDER82  BIO202_MH_V3  Topic 2: Cardiovascular System: The Heart Started on Thursday, October 21, 2021, 12:55 AM State Finished Completed on Thursday, O... ctober 21, 2021, 1:18 AM Time taken 22 mins 51 secs Grade 40.00 out of 40.00 (100%) Question 1 Correct 2.00 points out of 2.00 Flag question Question text Question 2 Correct 2.00 points out of 2.00 e. pacemaker potential a. threshold b. depolarization c. early repolarization d. final repolarization Which of the following events occurs first? Select one: CARDIOVASCULAR SYSTEM: THE HEART QUIZGUIDER82 Question text Question text Flag question Question 4 Correct 2.00 points out of 2.00 d. an increase in stroke volume. e. an increase in the frequency of action potentials. c. a decrease in the frequency of action potentials in the conduction system. a. an increased heart rate. b. a rapid repolarization of cardiac cells. Excess potassium ions in cardiac tissue cause Select one: Flag question Question 3 Correct 2.00 points out of 2.00 d. All of the choices are functions of the heart skeleton. a. Provides electrical insulation between the atria and ventricles. b. Supplies support and reinforcement for the valves. c. Provides a rigid site for cardiac muscle attachment. Which of the following is a function of the heart skeleton? Select one: Flag question CARDIOVASCULAR SYSTEM: THE HEART QUIZGUIDER82 Question text Question text Question text Which of the following is mismatched? Select one: Flag question Question 6 Correct 2.00 points out of 2.00 b. ectopic action potentials occur. c. action potential amplitude declines. d. more sodium channels open. e. it blocks calcium channels. [Show More]

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