Textbook Question
Describe the location and position of the heart in the body.
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Ch. 18 The Cardiovascular System: The Heart
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732
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Table of contents
- Ch. 1 The Human Body: An Orientation25
- Ch. 2 Chemistry Comes Alive24
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System12
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System25
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System25
- Ch. 13 The Peripheral Nervous System and Reflex Activity30
- Ch. 14 The Autonomic Nervous System16
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart25
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732Not the one you use?Change textbook
Chapter 18, Problem 8
Freshly oxygenated blood is first received by the:
a. Right atrium
b. Left atrium
c. Right ventricle
d. Left ventricle
Verified step by step guidance1
Understand the flow of blood through the heart: deoxygenated blood returns to the heart and is pumped to the lungs, while oxygenated blood returns from the lungs to the heart before being pumped to the body.
Recall that freshly oxygenated blood comes from the lungs via the pulmonary veins and enters the heart at the left atrium.
Identify the chambers of the heart: the right atrium and right ventricle handle deoxygenated blood, while the left atrium and left ventricle handle oxygenated blood.
Since freshly oxygenated blood is received first by the chamber that collects blood from the lungs, determine that this chamber is the left atrium.
Therefore, the correct answer corresponds to option b. Left atrium.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Heart Chambers and Their Functions
The heart has four chambers: two atria and two ventricles. The atria receive blood entering the heart, while the ventricles pump blood out. Understanding which chamber receives oxygenated versus deoxygenated blood is essential to answer the question.
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Oxygenated vs. Deoxygenated Blood Flow
Oxygenated blood comes from the lungs and is rich in oxygen, while deoxygenated blood returns from the body with low oxygen. Knowing the path of oxygenated blood helps identify which chamber receives it first.
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Pulmonary and Systemic Circulation
Pulmonary circulation moves blood between the heart and lungs, delivering deoxygenated blood to the lungs and returning oxygenated blood to the heart. Systemic circulation sends oxygenated blood from the heart to the body. This distinction clarifies the flow of oxygenated blood into the heart.
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Related Practice
Textbook Question
The refractory period of cardiac muscle is much longer than that of skeletal muscle. Why is this a desirable functional property?
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Textbook Question
The cardiac term that refers to the volume of blood remaining in a ventricle after contraction is
(a) end diastolic volume,
(b) end systolic volume,
(c) stroke volume,
(d) cardiac reserve.
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Textbook Question
In the heart, which of the following apply?
(1) Action potentials are conducted from cell to cell across the myocardium via gap junctions
(2) The SA node sets the pace for the heart as a whole
(3) Spontaneous depolarization of cardiac cells can occur in the absence of nerve stimulation
(4) Cardiac muscle can continue to contract for long periods in the absence of oxygen
a. All of the above
b. 1, 3, 4
c. 1, 2, 3
d. 2, 3
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Textbook Question
Draw a normal ECG pattern. Label and explain the significance of its deflection waves.
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Textbook Question
Select the anatomical or physiological feature that correctly describes cardiac muscle and not skeletal muscle.
(a) striations appear as alternating light and dark bands,
(b) intercalated discs connect adjacent muscle cells,
(c) sarcoplasmic reticulum stores and releases calcium ions,
(d) calcium ions bind troponin to signal contraction
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