Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 33, Problem 3FIB
The heart’s pacemaker is called the (complete term) ___________. The pacemaker is composed of specialized ___________. The pacemaker first sends impulses that stimulate contraction of both ___________. The (complete term) ___________ introduces a delay in the transmission of pacemaker signals into the ventricles. Signals are conducted from this node directly into fibers called the ___________. If the pacemaker loses control of heart contractions, ineffective quivering of the heart muscle, called ___________, may occur.
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The heart’s pacemaker is called the (complete term)_________. The pacemaker is composed of specialized________. The pacemaker first sends impulses that stimulate contraction of both_______. The (complete term)________introduces a delay in the transmission of pacemaker signals into the ventricles. Signals are conducted from this node directly into fibers called the________ . If the pacemaker loses control of heart contractions, ineffective quivering of the heart muscle, called_________, may occur.
____ is the contractile phase of the cardiac cycle and _____ is the relaxation phase of the cardiac cycle
In the figure below on the left, label the P, QRS and T waves. Describe what is happening in the heart in the P wave:
What is occurring in the electrical conduction system? Circle in the figure on the right, what part (if any) of the electrical conduction system is activated.
Chapter 33 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 33.1 - explain the major features of all circulatory...Ch. 33.1 - Why doesnt insect hemolymph need hemoglobin?Ch. 33.1 - compare open and closed circulatory systems?Ch. 33.1 - describe the functions of the vertebrate...Ch. 33.2 - Prob. 1CSCCh. 33.2 - describe the three types of vertebrate hearts and...Ch. 33.2 - Prob. 1HYEWCh. 33.2 - Prob. 1TCCh. 33.2 - Prob. 2CYLCh. 33.2 - Prob. 3CYL
Ch. 33.3 - describe each component of blood and explain its...Ch. 33.3 - Prob. 1TCCh. 33.3 - Prob. 2CYLCh. 33.3 - Prob. 2TCCh. 33.3 - explain the sequence of events during blood...Ch. 33.4 - Prob. 1CYLCh. 33.4 - Prob. 1ETCh. 33.4 - Prob. 1TCCh. 33.4 - Prob. 2CYLCh. 33.4 - Prob. 3CYLCh. 33.5 - Prob. 1CSCCh. 33.5 - Prob. 1CSRCh. 33.5 - Prob. 1CYLCh. 33.5 - Prob. 1TCCh. 33.5 - Prob. 2CYLCh. 33.5 - Prob. 3CYLCh. 33 - Prob. 1ACCh. 33 - Prob. 1FIBCh. 33 - Prob. 1MCCh. 33 - List the major structures of all circulatory...Ch. 33 - Prob. 2ACCh. 33 - Prob. 2FIBCh. 33 - Which of the following is True? a. Arteriole...Ch. 33 - Describe and compare the features of open and...Ch. 33 - The hearts pacemaker is called the (complete term)...Ch. 33 - Prob. 3MCCh. 33 - Explain how two- and three-chambered vertebrate...Ch. 33 - Prob. 4FIBCh. 33 - Prob. 4MCCh. 33 - Prob. 4RQCh. 33 - Prob. 5FIBCh. 33 - Which of the following is true of blood pressure?...Ch. 33 - Prob. 5RQCh. 33 - Prob. 6FIBCh. 33 - Prob. 6RQCh. 33 - Lymph is ___________ that has entered lymphatic...Ch. 33 - Prob. 7RQCh. 33 - Prob. 8RQCh. 33 - Describe the cardiac cycle, and relate the...Ch. 33 - Prob. 10RQCh. 33 - Prob. 11RQCh. 33 - Prob. 12RQCh. 33 - In what way do veins and lymphatic vessels...
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- Determine whether the statement is either true or false. To clearly hear the heart sound of the bicuspid valve, a stethoscope should be placed to the left of the sternum at the second intercostal space. At late diastole, the atria and ventricles are relaxed and the aortic semilunar valve is open. During ventricular contraction all the blood is forced out of the ventricles.arrow_forwardThe period during which a heart chamber is contracting is called _______ . The period during which a heart chamber is relaxing is called ________ . During ventricular the contraction the AV valves are _________ . During ventricular are relaxation the AV valves are ___________ . The pulmonary and aortic valves will be ___________ when the pressure in the ventricles exceeds pressure in the pulmonary trunk and aorta. Word Options for Blanks (some may be used more than once, some may not be used at all) diastole systole closed openarrow_forwardFill in the blank: Normally, the _______________________ node serves as the pacemaker of the heart.arrow_forward
- Fill in the blank: Of the ions that affect heart action, the most important are ions of calcium and ________________________.arrow_forwardFill in the blank: The first sound of a cardiac cycle occurs when the _______________________ are closing.arrow_forwardWhat type of cardiac rhythm is this?arrow_forward
- Trace the flow of blood across the different chambers of the heart. right atrium - _____ - right ventricle - _____- pulmonary trunk - _____ - lungs - _____ - left atrium - _____ - left ventricle Group of answer choices tricuspid valve/ pulmonic valve/ pulmonary arteries/ pulmonary veins/ bicuspid valve tricuspid valve/ pulmonic valve/ pulmonary veins/ pulmonary arteries/ bicuspid valve bicuspid valve/ pulmonic valve/ pulmonary veins/ pulmonary arteries/ tricuspid valve bicuspid valve/ pulmonic valve/ pulmonary arteries/ pulmonary veins/ tricuspid valvearrow_forwardThe second heart sound results from vibrations generated by the ______ of the _____ valves. A opening; atrioventricular B opening; atrioventricular and semilunar C closing; atrioventricular D closing; semilunararrow_forwardIf the left side of the heart fails, then __________________________ Group of answer choices 1)the heart is unable to move blood from the pulmonary circuit to the systemic circuit at the rate needed. This would result in the back up of blood in the lower legs with resulting edema 2)the heart is unable to move blood from the systemic circuit to the pulmonary circuit at the rate needed. This would result in the back up of blood in the aorta. 3)blood would not back up at all, but rather pressure would increase in the left ventricle. 4)the heart is unable to move blood from the pulmonary circuit to the systemic circuit at the rate needed. This would result in the back up of blood in the pulmonary circuit.arrow_forward
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