Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Question
Chapter 25, Problem 20RQ
Summary Introduction
To determine: The cardiac output provided heart rate is
Introduction: Cardiac output is the volume of blood pumped by the heart per minute. It tells us the capacity of the atrium and ventricles. The normal cardiac output of an adult man is
Summary Introduction
To determine: The cardiac output if the heartbeat increases to
Introduction: The stroke volume is the amount of blood pumped by the left ventricle in one contraction. The stroke volume can be calculated by subtracting end systolic volume from end diastolic volume.
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Check out a sample textbook solutionStudents have asked these similar questions
Consider the equation
cardiac output (CO) = stroke volume (SV) X heart rate
Which of the following changes would increase cardiac output?
Group of answer choices
An increase in afterload
An increase in EDV
A decrease in ventricle contractility
An increase in parasympathetic system stimulation of the SA node
If cardiac output is 16L/min during jogging, and 25% of total blood flow is being diverted to skeletal muscle, how much blood is being delivered to skeletal muscle in L/min?
a.
2
b.
5
c.
6
d.
1
e.
4
f.
3
What is the cardiac output of a person with a resting stroke volume of 60 mL and a heartbeat of 80 bpm. (BONUS: Is the calculated cardiac output normal or abnormal?)
Chapter 25 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 25.2 - If venous PO2 decreases as exercise intensity...Ch. 25.3 - In Figure 25.8b, why does the line for mean blood...Ch. 25.5 - The active vasodilator nerves to the skin secrete...Ch. 25 - Name the two muscle compounds that store energy in...Ch. 25 - Prob. 2RQCh. 25 - Prob. 3RQCh. 25 - Prob. 4RQCh. 25 - Prob. 5RQCh. 25 - What is meant by the term oxygen deficit, and how...Ch. 25 - Prob. 7RQ
Ch. 25 - In endurance events, body temperature can reach...Ch. 25 - Prob. 9RQCh. 25 - Prob. 10RQCh. 25 - Prob. 11RQCh. 25 - Prob. 12RQCh. 25 - Match the following brain areas with the...Ch. 25 - Specify whether each of the following parameters...Ch. 25 - Why doesnt increased venous return during exercise...Ch. 25 - Diagram the three theories that explain why the...Ch. 25 - Prob. 17RQCh. 25 - Explain how exercise decreases blood glucose in...Ch. 25 - Prob. 19RQCh. 25 - Prob. 20RQCh. 25 - The following graph shows left ventricular...
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Similar questions
- The contraction phase of the heartbeat is ______; the relaxation phase is _______.arrow_forwardHigh blood pressure would be a result of ___________ . a high cardiac output and high peripheral resistance a high cardiac output and low peripheral resistance a low cardiac output and high peripheral resistance a low cardiac output and low peripheral resistancearrow_forwardA motorcycle rider miscalculated a curve and met a horrible accident which resulted into major blood vessel injuries in the head and neck. Due to these injuries, one would expect to observe all of the following except which one among these? option 1.An increased heart rate option 2.An increase in cardiac output option 3.Increased secretion of renin by the kidneys option 4. An increased total peripheral resistancearrow_forward
- Why must this change occur? (in reference to how does the heart rate differ before and after exercise?)arrow_forwardDescribe the mechanisms that increase the cardiac output during exercise and that increase the rate of blood flow to the heart and skeletal muscles.arrow_forwardDescribe the physiology behind the change in blood pressure and heart rate change after exercisearrow_forward
- 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 Outputarrow_forwardSue goes to the gym and after an initial warm-up, she increases her exercise level pushing herself to maximum. At this point her heart rate is 175 beats/min and her stroke volume is 135 ml/beat. What is her cardiac output now? At this point, by how many ml/min has her CO increased over her resting CO? What % increase over resting is this? (Use the following equation). amount of increase in CO in ml/min % increase = _____________ X 100% original CO (resting) ml/min What term is used to describe this increase in CO?arrow_forward
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