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FUNDAMEN OF ANATOMY + PHYSIOLOGY + MAST
11th Edition
ISBN: 9780136782261
Author: Martini
Publisher: INTER PEAR
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Textbook Question
Chapter 20, Problem 27RQ
Describe the effects of epinephrine, norepinephrine, glucagon, and thyroid hormones on the contractility of the heart.
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Chapter 20 Solutions
FUNDAMEN OF ANATOMY + PHYSIOLOGY + MAST
Ch. 20 - Prob. 1CPCh. 20 - Prob. 2CPCh. 20 - Why is the left ventricle more muscular than the...Ch. 20 - Define autorhythmicity.Ch. 20 - Which structure of the heart is known as the...Ch. 20 - Prob. 6CPCh. 20 - Why is it important for impulses from the atria to...Ch. 20 - Give the technical terms for heart contraction and...Ch. 20 - List the phases of the cardiac cycle.Ch. 20 - Is the heart always pumping blood when pressure in...
Ch. 20 - What could cause an increase in the size of the...Ch. 20 - Define cardiac output.Ch. 20 - Prob. 13CPCh. 20 - Prob. 14CPCh. 20 - Prob. 15CPCh. 20 - Prob. 16CPCh. 20 - Prob. 17CPCh. 20 - The great cardiac vein drains blood from the heart...Ch. 20 - The autonomic centers for cardiac function are...Ch. 20 - Prob. 3RQCh. 20 - The simple squamous epithelium covering the heart...Ch. 20 - The heart is surrounded by the (a) pleural cavity,...Ch. 20 - The cardiac skeleton of the heart has which two of...Ch. 20 - Cardiac output is equal to the (a) difference...Ch. 20 - Identify the superficial structures in the...Ch. 20 - Identify the structures in the following diagram...Ch. 20 - During diastole, a chamber of the heart (a)...Ch. 20 - During the cardiac cycle, the amount of blood...Ch. 20 - What role do the chordae tendineae and papillary...Ch. 20 - Describe the three distinct layers that make up...Ch. 20 - What are the valves in the heart, and what is the...Ch. 20 - Trace the normal pathway of an electrical impulse...Ch. 20 - What is the cardiac cycle? What phases and events...Ch. 20 - What three factors regulate stroke volume to...Ch. 20 - The cells of the conducting system differ from the...Ch. 20 - Which of the following is longer? (a) the...Ch. 20 - If the papillary muscles fail to contract, (a) the...Ch. 20 - Cardiac output cannot increase indefinitely...Ch. 20 - Describe the function of the SA node in the...Ch. 20 - What are the sources and significance of the four...Ch. 20 - Differentiate between stroke volume and cardiac...Ch. 20 - What factors influence cardiac output?Ch. 20 - What effect does sympathetic stimulation have on...Ch. 20 - Describe the effects of epinephrine,...Ch. 20 - Vern is suffering from cardiac arrhythmias and is...Ch. 20 - Harvey has a heart murmur in his left ventricle...Ch. 20 - The following measurements were made on two...Ch. 20 - Prob. 31RQCh. 20 - Prob. 1CCCh. 20 - Prob. 2CC
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Describe the autonomic innervation of the heart.arrow_forwardDescribe the effects of sympathetic and parasympathetic neuronal stimulation on heart rate.arrow_forwardDescribe the mechanisms that increase the cardiac output during exercise and that increase the rate of blood flow to the heart and skeletal muscles.arrow_forward
- Describe the mechanism of action of intravenous injection of epinephrine or norepinephrine. What effect is expected on heart rate and blood pressure? How it affects blood vessels and circulation?arrow_forwardDescribe the mechanism of action of cardiac glycosides, such as digitalis.arrow_forwardDiscuss the pressure gradients through the heart that impact the flow of blood.arrow_forward
- Describe autorhymicity and the heart’s conducting system.arrow_forwardWhich of the following would most likely cause a baroreflex-mediatedincrease in heart rate?A)Intravenous administration of an alpha- 1 adrenergic receptor agonist.B)Intravenous administration of vasopressin.C)Stimulation of the arterial baroreceptor afferents.D)Profuse sweating for an hour without any fluid replacement.arrow_forwarda)How is one-way flow through the heart achieved and What are the stages of the cardiac cycle and the changes in pressure that occur in thechambers?b)Define how cardiac output is calculated, and what it can tell you about heart function. c. What factors influence cardiac output to maintain adequate perfusion?arrow_forward
- Define each of the following external features of the heart: auricle, coronary sulcus, anterior interventricular sulcus, and posterior interventricular sulcus.arrow_forwardDescribe the relationship between end-diastolic volume and stroke volume in a worsening heart failure.arrow_forwardBriefly define 1) Starling’s Law of the heart, 2) the basic cellular mechanism thought to mediate this response, and 3) the physiological significance of this effect.arrow_forward
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