Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
11th Edition
ISBN: 9781488687075
Author: Lisa, A. 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
. 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.)…
Based on the results shown in Figures 2A and 2B, was there a significant change in TP interval in either group? Explain your results using your knowledge of the cardiac cycle and of how the heart is regulated by electrical activity.
Chapter 42 Solutions
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
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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Similar questions
- 24. When given an image of a cardiac contractile cell, such as the one belo describe the steps that occur during excitation-contraction coupling (the "before op 1" step show with the squiggly red arrow below), contraction (steps 1-6 below) AND relaxation (steps 7-10 belowl). Be sure to fully describe the role of Ca*2 ATPase and Na Ca+2 exchanger (NCX) in steps 9 and 101 ECF ICF SR Ca2+ RyR 1. Ca sparks Ca signal Contraction Ltype Ca channel 2 K ATP ATP 3 Na 3 Nat Ca Sarcoplasmic reticulum (SR) Cal stores TALL NCX Relaxation Ca2+ oe FI Actin Myosinarrow_forwardERCISE 36 Electrical Activity of the Heart Use this grid to graph the heart rates observed after exercise. Be sure to label your graph completely and accurately. bon Put in Order (rearrange these heart structures in the order through which electrical signals are conducted in a single cardiac cycle) Put in Order 1. atrial myocardium AV bundle branches nim 2. AV bundle AV node subendocardial (Purkinje) fibers SA node 3. 4. 5. ventricular myocardium 6. Fill-in (complete each statement with the correct term) 7. 1. Relaxation of a heart chamber is called _?_. 2. Contraction of a heart chamber is called _?_. 3. The portion of the ECG that represents ventricular repolarization is the _?. 4. Leads I, II, and III together are called the _?_ leads, or appendicular leads. 5. ? is the condition of elevated heart rate. Fill-in 1. 2. 3. 4. 5. a 0010 bu Floouior Inc All rights reserved.arrow_forward* ? Which one is true For few seconds the blood supplies CO2 to cells and picks up 02. For few mints the blood supplies 02 to cells and picks up CO2. For few seconds the blood supplies 02 to cells and picks up CO2. The blood is pumped by contraction of the heart muscle None From left ventricle at pressure of 125 mmHg and finally into very fine meshwork. From right ventricle at pressure of 125 mmHg and finally into very fine meshwork.arrow_forward
- Q4. THROUGH A PROPER DIAGRAMN, EXPLAIN ANATOMY OF THE HEART BLOOD, NERVE AND VENOUS SUPPLY?arrow_forwardWhat is the effect on CO with the increase in heart rate (HR) and blood pressure (MAP)? O An increase in both the heart rate (HR) and blood pressure (MAP) increases cardiac output (CO) of the heart. O An increase in the cardiac output (CO) of the heart decreases both the heart rate (HR) and blood pressure (MAP) An increase in the cardiac output (CO) of the heart decreases the heart rate (HR) and increases blood pressure (MAP) An increase in the cardiac output (CO) of the heart increases the heart rate (HR) and decreases blood pressure (MAP)arrow_forwardCanvas ← X Ⓡ Question 22 The corresponding mechanical events of P wave and the QRS complex are oo O Depolarization of the ventricles; repolarization of the atria O O O Depolarization of the ventricles; polarization of the SA Node contraction of the atria; contraction of the ventricle Contraction of the AV node; relaxation of the SA node Repolarization of the ventricles; polarization of the atria and ventricles and respectively?arrow_forward
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