Cardiopulmonary Anatomy & Physiology
7th Edition
ISBN: 9781337794909
Author: Des Jardins, Terry.
Publisher: Cengage Learning,
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Chapter 12, Problem 2RQ
Summary Introduction
Introduction:
The contraction of the heart is based on the generation and propagation of the action potential. It can be defined as the
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Chapter 12 Solutions
Cardiopulmonary Anatomy & Physiology
Ch. 12 - 1. Which of the following is the rapid upstroke in...Ch. 12 - Prob. 2RQCh. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - Which of the following slows the heart rate and AV...Ch. 12 - Prob. 6RQCh. 12 - Prob. 7RQCh. 12 - Which of the following means the ability to...Ch. 12 - An electrical difference across the fibers of the...Ch. 12 - Prob. 10RQ
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- Complete ventricular filling occurs during what phase of the cardiac cycle? a. when the atria are in diastole b. when the ventricles are in diastole c. when the ventricles are in systolearrow_forwardWhy might the increase in heart rate associated with a vigorous exercise program be the cause of his becoming unconscious? a. increase in blood pressure throughout the body b. failure of the conduction system c. increase in return volume of blood to the heart d. coronary blood flow reduction due to tachycardiaarrow_forwardWhat layer of the heart would be most immediately susceptible to infections caused by bacteria circulating in the blood? a. myocardium b. pericardium c. epicardium d. endocardiumarrow_forward
- a calcium channel blocker or an antagonist drug will produce a. vasoconstriction b. increase in blood pressure c. increase in total peripheral resistance d. reduction in cardiac muscle contractilityarrow_forwardWhat is responsible for the first heart sound (lub)? A. Contraction of the atria. B. Contraction of the ventricles C. Closing of the atrioventricular valves D. Closing of the semilunar valvesarrow_forwardWhat is going on with the ventricles of the heart during the S-T interval? a. The ventricles are relaxed. b. The left ventricle is contracting, the right ventricle is relaxing. c. The ventricles are contracting. d. The right ventricle is contracting, the left ventricle is relaxing.arrow_forward
- Patients who had myocardial infarction is commonly given this medication. it is used to prevent clot formation in patients with damaged heart valves or blood vessels. a. digitalis b. amlodipine c. aspirin d. nitroglycerinarrow_forwardSelect the correct one, Which of the following would not increase Cardiac Output? A. increase blood epinephrine concentration B. Increase Atrial Preload C. Increase Cardiac sarcoplasmic calcium concentration D. Increase Arterial Afterloadaarrow_forwardWhich individual is most likely to have the highest hematocrit level? a. a 10-year-old child b. a dehydrated adult male c. a healthy, nonmenstruating adult female d. a healthy, menstruating adult femalearrow_forward
- When you measure blood pressure, the Korotkoff sounds (i.e. the sounds heard through a stethoscope) are produced by? A. turbulent blood flow B. valves closing C. ventricular repolarization D. ventricular depolarization?arrow_forwardHyperkalemia or high blood potassium is associated with a.Heart arrhythmia b.Cardiac arrest c.Not associated with any negative health effects d.a, barrow_forwardHigh blood pressure, often caused by constricted vessels, is called a. Diabetes b. Hypertension c. Anemia d. Delayed clottingarrow_forward
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