Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135755785
Author: Gerald Audesirk, Teresa Audesirk
Publisher: PEARSON+
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Chapter 33, Problem 1AC
Summary Introduction
To describe:
The advantage of four-chambered heart with its two separate pumps.
Introduction:
The heart pumps blood throughout the body and provides transport of oxygen and the other gases. The number of chambers present in the heart defines the three major heart types; two-chambered, three-chambered, and four-chambered heart.
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Students have asked these similar questions
18. Under the microscope, I can see a section through one of the chambers of the heart. The
myocardium is thick and the endocardium is very thin. In addition, I can see a valve that connects
this chamber to the next which has two cusps that prevent backflow from one chamber into
another.
Where in the heart am 1?
What does the thickness of the myocardium tell you about this region of the heart?
What is the valve called? What does it do?
What other valve would you see in this area of the heart? Where is it situated?
22. In the cardiac cycle, the occurrence of the diastole is most likely indicated at which of the following labeled sites on the ECG or phonocardiogram shown?
O A)
B)
D
(A)
Electrocardiogram
(E
B
Phonocardiogram
C)
D)
E)
6. Which of the following statements concerning the differences between action potentials in skeletal muscle cells and in ventricular cardiac muscle cells is TRUE?
A)The efflux of K+ repolarizes skeletal muscle cells after an action potential, while repolarization in cardiac muscle cells is due to the efflux of Ca2+
B)Unlike skeletal muscle cells, the initial depolarization of ventricular cells is mainly due to Ca2+ influx, not Na+ influx
C)Action potentials in skeletal muscle cells are longer in duration than action potentials in cardiac muscle cells
D)After sodium influx through voltage gated channels occurs in ventricular cells, prolong influx of calcium from the extracellular fluid occurs. No such calcium influx occurs in skeletal muscle cells.
E)Like skeletal muscle cells, ventricular cardiac muscle cells have a resting potential primarily dependent on sodium.
Chapter 33 Solutions
Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
Ch. 33.1 - Why doesnt insect hemolymph need hemoglobin?Ch. 33.1 - Prob. 1CYLCh. 33.1 - compare open and closed circulatory systems?Ch. 33.1 - describe the functions of the vertebrate...Ch. 33.2 - Prob. 1CSCCh. 33.2 - Prob. 1TCCh. 33.2 - Prob. 1HYEWCh. 33.2 - describe the three types of vertebrate hearts and...Ch. 33.2 - Prob. 2CYLCh. 33.2 - Prob. 3CYL
Ch. 33.3 - Prob. 1TCCh. 33.3 - Prob. 2TCCh. 33.3 - describe each component of blood and explain its...Ch. 33.3 - Prob. 2CYLCh. 33.3 - explain the sequence of events during blood...Ch. 33.4 - Prob. 1TCCh. 33.4 - Prob. 2TCCh. 33.4 - Prob. 1CYLCh. 33.4 - Prob. 2CYLCh. 33.4 - Prob. 3CYLCh. 33.5 - Prob. 1TCCh. 33.5 - Prob. 1CSCCh. 33.5 - Prob. 1CYLCh. 33.5 - Prob. 2CYLCh. 33.5 - Prob. 3CYLCh. 33 - Prob. 1MCCh. 33 - Which of the following is True? a. Arteriole...Ch. 33 - Prob. 3MCCh. 33 - Prob. 4MCCh. 33 - Which of the following is true of blood pressure?...Ch. 33 - Prob. 1FIBCh. 33 - Prob. 2FIBCh. 33 - The hearts pacemaker is called the (complete term)...Ch. 33 - Prob. 4FIBCh. 33 - Prob. 5FIBCh. 33 - Prob. 6FIBCh. 33 - Lymph is ___________ that has entered lymphatic...Ch. 33 - List the major structures of all circulatory...Ch. 33 - Describe and compare the features of open and...Ch. 33 - Explain how two- and three-chambered vertebrate...Ch. 33 - Prob. 4RQCh. 33 - Prob. 5RQCh. 33 - Prob. 6RQCh. 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...Ch. 33 - Prob. 1ACCh. 33 - Prob. 2AC
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- Which of the following lists the valves in the order through which the blood flows from the vena cava through the heart? tricuspid, pulmonary semilunar, bicuspid, aortic semilunar mitral, pulmonary semilunar, bicuspid, aortic semilunar aortic semilunar, pulmonary semilunar, tricuspid, bicuspid bicuspid, aortic semilunar, tricuspid, pulmonary semilunararrow_forward6. Describe the mechanical events of the cardiac cycle (as in Figure 14.18a), including isovolumic ventricular contraction and isovolumic ventricular relaxation (pressure- volume curve of left ventricle, Figure 14.18b). What causes valves to open and close during a cardiac cycle?arrow_forward#8arrow_forward
- 7. The P-Wave in the electrocardiogram... A)Gives information about the oxygenation content of the blood B)Happens when the semilunar valves are closed C)Can give information about how much blood is pumped out D)Represents atrial contraction E)Two of these options are correctarrow_forward5.According to Steven et al., (2006), hypoplastic left heart syndrome is a medical terminology used to describe a spectrum of congenital heart malfomation exhbiting an array of underdeveloped structures in the left side of the heart. How does this affect the anatomical and physiological function of the left side of the heart? Read and analyze the question and choices CAREFULLY; more importantly, ALWAYS CHOOSE the BEST answer. The heart will have a difficulty in pumping oxygenated blood to all parts of the body The heart is bound to enlarge by loosening its myocardium after a few years. The heart will not be able to absorb oxygen from the lungs. The heart will exert too much pressure to deliver oxygen-poor blood to the lungs.arrow_forward1. The endocardium of the heart is composed of THREE layers. Describe their structure and also explain how the thickness of the endocardial layer varies between different chambers of the heartarrow_forward
- 2. Fill-in-the-blanks: Blood flow into the_________ (pulmonary circuit/systemic circuit) would __________(increaseldecrease) if the left side of the heart fails. Blood flow into the ________(pulmonary circuit/systemic circuit) would _________(increaseldecrease) if the right side of the heart fails.arrow_forward6. Fill in the blanks with the correct terms to describe the path of blood flow through the heart (starting with the deoxygenated blood coming from the body's tissues and ending with the oxygenated blood flowing to the body's tissues). Use the following terms: aorta, aortic semilunar valve, bicuspid (mitral) valve, left atrium, left ventricle, pulmonary artery, pulmonary semilunar valve, pulmonary veins, right atrium, right ventricle, superior and inferior vena cava, tricuspid valve. Blood from the tissues → > lungs > → body tissuesarrow_forward(i) A scene of a TV drama showed that a heart continues to beat when it was ripped from a brain-dead patient. Is that possible? Elaborate your answer.arrow_forward
- 6. If the left side of the heart were failing, how would this change the pressure that the right side of the heart needed to generate to continue moving blood into the pulmonary circuit?arrow_forward27. All of the followings are incorrect about adult human heart, except ---------------------. A. There is a lower systemic than pulmonary arterial blood pressure B. There are four chambers in the heart C. The right atrium receives blood directly from pulmonary veins D. In adults, right atrium is connected to the left atrium by the foramen ovale E. The right atrium is electrically coupled to the right ventricle by the SA nodearrow_forward54. Trace blood flow through the chambers and vessels of the pigeons heart. Use red for oxygenated blood and blue for deoxygenated blood. A pigeons heart is depicted below.;?arrow_forward
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