CAMPBELL BIOLOGY,VOL.II >CUSTOM<
17th Edition
ISBN: 9781323803677
Author: Urry
Publisher: PEARSON
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Question
Chapter 42.2, Problem 3CC
Summary Introduction
To explain: The changes in functions of heart after regular exercise for several months.
Concept introduction:
Stroke volume means for each heart beat, the volume of blood is pumped out by each ventricle. The volume of blood pumped out through each ventricle by the heart per minute is the cardiac output. The cardiac output increases the active state and decreases in resting condition. The body has the ability to alter the heart rate and stroke volume.
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Students have asked these similar questions
In conditioned athletes, the resting Heart Rate is generally much lower than in non-athletes. Why?
a-because long-term exercise reduces Cardiac Output at rest to conserve energy
b-because athletes have a smaller Stroke Volume at rest, causing Heart Rate to decrease as well
c-because long-term exercise leads to increased vagal tone which slows Heart Rate
d-because athletes have stronger ventricles and therefore a larger Stroke Volume at rest, so they require fewer bpm to achieve the same Cardiac Output
1 bio
. Cardiac output In the late 1860s, Adolf Fick, a professor of
physiology in the Faculty of Medicine in Würzberg, Germany.
developed one of the methods we use today for measuring how
much blood your heart pumps in a minute. Your cardiac output as
you read this sentence is probably about 7L/min. At rest it is
likely to be a bit under 6 L/min. If you are a trained marathon
runner running a marathon, your cardiac output can be as high as
30 L/min.
Your cardiac output can be calculated with the formula
where Qis the number of milliliters of CO, you exhale in a minute
and D is the difference between the CO, concentration (ml/L)
in the blood pumped to the lungs and the CO, concentration in
the blood returning from the lungs. With Q - 233 ml/min and
D - 97 - 56 - 41 ml/L,
233 ml/min
5.68 L/min,
41 ml/L
fairly close to the 6 L/min that most people have at basal (resting)
conditions. (Data courtesy of J. Kenneth Herd, M.D., Quillan Col-
lege of Medicine, East Tennessee State University.)…
Chapter 42 Solutions
CAMPBELL BIOLOGY,VOL.II >CUSTOM<
Ch. 42.1 - Prob. 1CCCh. 42.1 - Three-chambered hearts with incomplete septa were...Ch. 42.1 - Prob. 3CCCh. 42.2 - Explain why blood has a higher 02 concentration in...Ch. 42.2 - Prob. 2CCCh. 42.2 - Prob. 3CCCh. 42.3 - Prob. 1CCCh. 42.3 - Prob. 2CCCh. 42.3 - Prob. 3CCCh. 42.4 - Explain why a physician might order a white cell...
Ch. 42.4 - Prob. 2CCCh. 42.4 - Prob. 3CCCh. 42.4 - Prob. 4CCCh. 42.5 - Why is an internal location for gas exchange...Ch. 42.5 - Prob. 2CCCh. 42.5 - MAKE CONNECTIONS Describe similarities in the...Ch. 42.6 - Prob. 1CCCh. 42.6 - Prob. 2CCCh. 42.6 - Prob. 3CCCh. 42.7 - What determines whether O2 and CO2 undergo net...Ch. 42.7 - How does the Bohr shift help deliver O2 to very...Ch. 42.7 - Prob. 3CCCh. 42 - How does the flow of a fluid in a closed...Ch. 42 - Prob. 42.2CRCh. 42 - Prob. 42.3CRCh. 42 - Prob. 42.4CRCh. 42 - Prob. 42.5CRCh. 42 - How does air in the lungs differ from the fresh...Ch. 42 - How are the roles of a respiratory pigment and an...Ch. 42 - Prob. 1TYUCh. 42 - Blood returning to the mammalian heart in a...Ch. 42 - Prob. 3TYUCh. 42 - When you hold your breath, which of the following...Ch. 42 - Prob. 5TYUCh. 42 - Prob. 6TYUCh. 42 - Prob. 7TYUCh. 42 - DRAW IT Plot blood pressure against time for one...Ch. 42 - EVOLUTION CONNECTION One opponent of the movie...Ch. 42 - Prob. 10TYUCh. 42 - Prob. 11TYUCh. 42 - WRITE ABOUT A THEME: INTERACTIONS Some athletes...Ch. 42 - Prob. 13TYU
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