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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Why do heart attacks cause permanent tissue damage? a. The sinoatrial nodes cannot restore the cardiac cycle. b. Purkinje fibers do not transmit nerve impulses properly. c. Myocardium cells cannot relax. d. Cardiac cells die due to lack of blood irrigation
What 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. endocardium
What 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 valves
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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- 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_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_forwardWhen 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_forward
- High blood pressure, often caused by constricted vessels, is called a. Diabetes b. Hypertension c. Anemia d. Delayed clottingarrow_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_forward_________________causes an increase in blood pressure. A. Increased Blood Volume B. Arterial Vasodilation C. Blood Volume Depletion D. Vagal Stimulation of the heartarrow_forward
- a. Ventricular diastole b. Throughout the cardiac cycle c. Between cardiac cycles d. Ventricular systolearrow_forwardEndocarditis is an inflammation of which portion of the heart? a. pericardium b. endocardium c. epicardium d. myocardiumarrow_forwardMedication to treat congestive heart failure include all except A. Angiotensin converting enzyme inhibitors B. Vasoconstrictors C. Beta blockers and calcium channel blockers D. Massive fluids Choose the correct answerarrow_forward
- SA node is the main pacemaker of the heart. Why is the normal heart rate lower than the intrinsic firing rate of the SA node? A. sympathetic inputs from the hypothalamus are slowing it down B. parasympathetic inputs from medulla oblongata are slowing it down C. there is inertia in heart muscle as it takes time for impulse to spread through all the cells D. centrifugal inputs from the AV node are slowing it downarrow_forwardwhich of the following factors will increase the cardiac output? a. decreased heart rateb. increased stroke volumec. increased end-systolic volume d. decreased sympathetic activitye. decreased venous returnarrow_forwardDuring the systolic phase of the cardiac cycle, the heart is. a. contracting b. relaxing c. contracting and relaxing d. filling with bloodarrow_forward
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