Campbell Biology in Focus; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433776
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Textbook Question
Chapter 34.1, Problem 2CC
Three-chambered hearts with incomplete septa were once viewed as being less adapted to circulatory function than mammalian hearts. What advantage of such hearts did this viewpoint overlook?
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Amphibians have three-chambered hearts, which have some limitations when compared to the four-chambered hearts of birds and mammals. Describe a disadvantage of a three-chambered heart (in comparison to a four-chambered heart), and one way in which amphibians are able to compensate for it.
In the evolution of circulatory systems, how is a 4-chambered heart advantageous compared to a 3-chambered heart?
Hearts of mammals are described to have double pump structure. Which choice explains the functional and structural basis for the said description?
A. Blood enters the atrium and pumped into ventricle.
B. Blood pressure alternates between systolic and diastolic at all times.
C. Atrium provide 1 pump, ventricle provides 2nd pump.
D. Heart pumps blood simultaneously in systemic and pulmonary circuit.
Chapter 34 Solutions
Campbell Biology in Focus; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology in Focus (2nd Edition)
Ch. 34.1 - How is the now of hemolymph through an open...Ch. 34.1 - Three-chambered hearts with incomplete septa were...Ch. 34.1 - Prob. 3CCCh. 34.2 - Prob. 1CCCh. 34.2 - Why is it important that the AV node delay the...Ch. 34.2 - Prob. 3CCCh. 34.3 - What is the primary cause of the low velocity of...Ch. 34.3 - Prob. 2CCCh. 34.3 - Prob. 3CCCh. 34.4 - Prob. 1CC
Ch. 34.4 - Prob. 2CCCh. 34.4 - Prob. 3CCCh. 34.4 - Prob. 4CCCh. 34.5 - Why is an internal location for gas exchange...Ch. 34.5 - After a heavy rain, earthworms come to the...Ch. 34.5 - MAKE CONNECTIONS Describe similarities in the...Ch. 34.6 - Prob. 1CCCh. 34.6 - Prob. 2CCCh. 34.6 - WHAT IF? If an injury tore a small hole in the...Ch. 34.7 - What determines whether O2, or CO2, undergoes net...Ch. 34.7 - How does the Bohr shift help deliver O2, to very...Ch. 34.7 - Prob. 3CCCh. 34 - Which of the following respiratory systems is not...Ch. 34 - Blood returning to the mammalian heart in a...Ch. 34 - Pulse is a direct measure of A. blood pressure. B....Ch. 34 - Prob. 4TYUCh. 34 - One feature that amphibians and humans have in...Ch. 34 - If a molecule of CO2 released into the blood in...Ch. 34 - Prob. 7TYUCh. 34 - DRAW IT Plot blood pressure against time for one...Ch. 34 - Prob. 9TYUCh. 34 - Prob. 10TYUCh. 34 - Prob. 11TYUCh. 34 - SYNTHESIZE YOUR KNOWLEDGE The diving bell spider...
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- In the evolution of circulatory systems, how is a two-circuit circulatory system (such as that found in frogs) advantageous compared to a single-circuit circulatory system (such as that found in fishes)?arrow_forwardDescribe the evolutionary change in the pattern of heart among the vertebratesarrow_forwardWhy does the mammalian heart have 2 pumping chambers? What is the purpose?arrow_forward
- explain why even large flatworms from centimeters to meters long can do just fine without the complax circulatory systems seen in other large animals ?arrow_forwardThe mammalian heart can beat without input from the brain. True Or false?arrow_forwardWhich feature is found in an open circulatory system but never in a closed circulatory system?arrow_forward
- The mammalian circulatory system includes a four- chambered heart and a double-loop circulation. How do the four chambers of the heart relate to the two circulatory loops?arrow_forwardBriefly describe the differences among animal circulatory systems. What is an open system versus a closed? What are the anatomical differences among vertebrate hearts?arrow_forwardCompare the structure of reptilian and mammalian hearts, tracing the flow of blood through the double circulatory system.arrow_forward
- Many invertebrates utilize the body cavity as a circulatory system. However, in humans, the body cavity plays no role whatsoever in circulation. Why?arrow_forwardWhich sequence of blood flow can be observed in either a reptile or a mammal? right atrium → pulmonary artery → left atrium → ventricle left ventricle → aorta → lungs → systemic circulation right ventricle → pulmonary vein → pulmocutaneous circulation pulmonary vein → left atrium → ventricle → pulmonary circuit vena cava → right atrium → ventricle → pulmonary circuitarrow_forwardWhich of the following statements about vertebrate circulatory systems is not true? A. In mammals, the blood pressure in the aorta is higher than the pressure in the pulmonary artery. B. In fishes, oxygenated blood from the gills returns directly to the heart through the left atrium. C. In birds, deoxygenated blood leaves the heart through the pulmonary artery. D. In reptiles, the blood in the pulmonary artery has a lower oxygen content than the blood in the aorta. E. In amphibians, deoxygenated blood enters the heart through the right atrium.arrow_forward
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