ANATOMY+PHYSIOLOGY-PACKAGE
6th Edition
ISBN: 9780134644363
Author: Marieb
Publisher: PEARSON
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Textbook Question
Chapter 17.5, Problem 13CYU
MAKING connections Below are drawings of three different action potentials. Two of these occur in the heart, and one occurs in skeletal muscle (as you learned in the chapter Muscles and Muscle Tissue Chapter 9)
Which one comes from a contractile cardiac muscle cell? A skeletal muscle cell? A cardiac pacemaker cell? For each one, state which ion is responsible for the depolarization phase and which ion is responsible for the repolarization phase.
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Chapter 17 Solutions
ANATOMY+PHYSIOLOGY-PACKAGE
Ch. 17.1 - The heart is in the mediastinum. Just what is the...Ch. 17.1 - From inside to outside, list the layers of the...Ch. 17.1 - What is the purpose of the serous fluid inside the...Ch. 17.2 - What is the function of the papillary muscles and...Ch. 17.2 - Prob. 5CYUCh. 17.3 - Which side of the heart acts as the pulmonary...Ch. 17.3 - Which of the following statements are true? (a)...Ch. 17.3 - Prob. 8CYUCh. 17.4 - For each of the following, state whether it...Ch. 17.5 - Cardiac muscle cannot go into tetany. Why?
Ch. 17.5 - Which part of the intrinsic conduction system...Ch. 17.5 - Describe the electrical event in the heart that...Ch. 17.5 - MAKING connections Below are drawings of three...Ch. 17.6 - The second heart sound is associated with the...Ch. 17.6 - If the mitral valve were insufficient, would you...Ch. 17.6 - During the cardiac cycle, there are two periods...Ch. 17.7 - Prob. 17CYUCh. 17.7 - What problem of cardiac output might ensue if the...Ch. 17 - When the semilunar valves are open, which of the...Ch. 17 - The portion of the intrinsic conduction system...Ch. 17 - An ECG provides information about (a) cardiac...Ch. 17 - The sequence of contraction of the heart chambers...Ch. 17 - The fact that the left ventricular wall is thicker...Ch. 17 - Prob. 6MCCh. 17 - In the heart, which of the following apply? (1)...Ch. 17 - The activity of the heart depends on intrinsic...Ch. 17 - Freshly oxygenated blood is first received by the...Ch. 17 - Describe the location and position of the heart in...Ch. 17 - Describe the pericardium and distinguish between...Ch. 17 - Trace one drop of blood from the time it enters...Ch. 17 - (a) Describe how heart contraction and relaxation...Ch. 17 - The refractory period of cardiac muscle is much...Ch. 17 - (a) Name the elements of the intrinsic conduction...Ch. 17 - Draw a normal ECG pattern. Label and explain the...Ch. 17 - Define cardiac cycle, and follow the events of one...Ch. 17 - What is cardiac output, and how is it calculated?Ch. 17 - Discuss how the Frank-Starling law of the heart...Ch. 17 - Prob. 1CCSCh. 17 - Prob. 2CCSCh. 17 - Prob. 3CCSCh. 17 - Prob. 4CCSCh. 17 - Prob. 5CCSCh. 17 - Prob. 6CCS
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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
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- 24. Compared to the skeletal muscle, cardiac muscle fibers ---------------------. A. Generate action potentials with a long plateau phase B. Cell membrane remain in a refractory state until the heart has returned to a relaxed state C. Do not have summation of contractions D. All of the above are correct E. None of the above are correct 25. In case of fight or flight, ---------------------. A. Norepinephrine released from sympathetic neurons and epinephrine released from the adrenal medulla work on β1-adrenergic receptor of cardiac pacemaker cells B. Less Na+ and Ca2+ channels open in cardiac pacemaker cells C. There is a decrease in cardiac muscles contractility D. All of the above are correct E. None of the above are correct 26. Rest and digest will, ---------------------. A. Increases the heart rate B. Increases potassium conductance in the cardiac pacemaker cells C. Hypo polarize pacemaker cells D. All of the above are correct E. Only B and C are correct 27. All of the followings…arrow_forwardWhich component of the heart conduction system would have the slowest rate of firing? atrioventricular node atrioventricular bundle bundle branches Purkinje fibersarrow_forwardWHAT IF? Suppose that after you exercise regularly forseveral months, your resting heart rate decreases, butyour cardiac output at rest is unchanged. Based on theseobservations, what other change in the function of yourheart at rest likely occurred?arrow_forward
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