Textbook Question
Blood returning to the mammalian heart in a pulmonary vein drains first into the
a. Left atrium
b. Right atrium
c. Left ventricle
d. Right ventricle
Ch. 42 - Circulation and Gas Exchange
Urry11th EditionCampbell BiologyISBN: 9789357423311
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Table of contents
- Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry8
- Ch. 2 - The Chemical Context of Life8
- Ch. 3 - Water and Life6
- Ch. 4 - Carbon and the Molecular Diversity of Life9
- Ch. 5 - The Structure and Function of Large Biological Molecules9
- Ch. 6 - A Tour of the Cell6
- Ch. 7 - Membrane Structure and Function6
- Ch. 8 - An Introduction to Metabolism6
- Ch. 9 - Cellular Respiration and Fermentation10
- Ch. 10 - Photosynthesis7
- Ch. 11 - Cell Communication7
- Ch. 12 - The Cell Cycle10
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance7
- Ch. 16 - The Molecular Basis of Inheritance9
- Ch. 17 - Gene Expression: From Gene to Protein9
- Ch. 18 - Regulation of Gene Expression10
- Ch. 19 - Viruses6
- Ch. 20 - DNA Tools and Biotechnology8
- Ch. 21 - Genomes and Their Evolution8
- Ch. 22 - Descent with Modification: A Darwininan View of Life6
- Ch. 23 - The Evolution of Populations5
- Ch. 24 - The Origin of Species6
- Ch. 25 - The History of Life on Earth6
- Ch. 26 - Phylogeny and the Tree of Life7
- Ch. 27 - Bacteria and Archaea8
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants7
- Ch. 31 - Fungi5
- Ch. 32 - An Overview of Animal Diversity4
- Ch. 33 - An introduction to Invertebrates6
- Ch. 34 - The Origin and Evolution of Vertebrates7
- Ch. 35 - Vascular Plant Structure, Growth, and Development8
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition10
- Ch. 38 - Angiosperm Reproduction and Biotechnology8
- Ch. 39 - Plant Responses to Internal and External Signals8
- Ch. 40 - Basic Principles of Animal Form and Function8
- Ch. 41 - Animal Nutrition7
- Ch. 42 - Circulation and Gas Exchange7
- Ch. 43 - The Immune System6
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction8
- Ch. 47 - Animal Development8
- Ch. 48 - Neurons, Synapses, and Signaling6
- Ch. 49 - Nervous Systems8
- Ch. 50 - Sensory and Motor Mechanisms5
- Ch. 51 Animal Behavior6
- Ch. 52 - An Introduction to Ecology and the Biosphere7
- Ch. 53 - Population Ecology10
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Chapter 42, Problem 5
One feature that amphibians and humans have in common is
a. The number of heart chambers.
b. A complete separation of circuits for circulation.
c. The number of circuits for circulation.
d. A low blood pressure in the systemic circuit.
Verified step by step guidance1
Understand the circulatory system of amphibians: Amphibians typically have a three-chambered heart, consisting of two atria and one ventricle. This allows for some mixing of oxygenated and deoxygenated blood.
Understand the circulatory system of humans: Humans have a four-chambered heart, consisting of two atria and two ventricles, which allows for complete separation of oxygenated and deoxygenated blood.
Identify the number of circuits for circulation: Both amphibians and humans have two circuits for circulation, known as the pulmonary circuit and the systemic circuit.
Consider the separation of circuits: In humans, the separation is complete due to the four-chambered heart, whereas in amphibians, the separation is not complete due to the three-chambered heart.
Evaluate blood pressure in the systemic circuit: Humans typically have higher blood pressure in the systemic circuit compared to amphibians, due to the complete separation and efficient pumping of the heart.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Circulatory System
The circulatory system is responsible for the transport of blood, nutrients, oxygen, carbon dioxide, and hormones throughout the body. In vertebrates, it consists of the heart, blood vessels, and blood. Understanding the structure and function of the circulatory system is crucial for comparing the similarities and differences between amphibians and humans.
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02:15
Lymphatic System
Heart Chambers
Heart chambers are compartments within the heart that play a role in pumping blood. Amphibians typically have a three-chambered heart, consisting of two atria and one ventricle, while humans have a four-chambered heart, with two atria and two ventricles. This difference affects how blood is circulated and oxygenated in these organisms.
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05:13Heart Physiology
Circuits of Circulation
Circuits of circulation refer to the pathways through which blood travels in the body. Amphibians have a double circulatory system with pulmonary and systemic circuits, similar to humans. However, the separation of these circuits is incomplete in amphibians, leading to some mixing of oxygenated and deoxygenated blood, unlike the complete separation seen in humans.
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06:28Gas Exchange and Circulation
Related Practice
Textbook Question
Pulse is a direct measure of
a. Blood pressure.
b. Stroke volume.
c. Cardiac output.
d. Heart rate.
Textbook Question
When you hold your breath, which of the following blood gas changes first leads to the urge to breathe?
a. Rising O2
b. Falling O2
c. Rising CO2
d. Falling CO2
Textbook Question
If a molecule of CO2 released into the blood in your left toe is exhaled from your nose, it must pass through all of the following except
a. The pulmonary vein.
b. The trachea.
c. The right atrium.
d. The right ventricle.
Textbook Question
Compared with the interstitial fluid that bathes active muscle cells, blood reaching these cells in arterioles has a
a. Higher PO2.
b. Higher PCO2.
c. Greater bicarbonate concentration.
d. Lower pH.