Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Question
Chapter 34.2, Problem 3CC
Summary Introduction
To determine:
What changes occur after doing regular exercise for several months. The resting heart rate decreases but cardiac output is remains unchanged.
Introduction:
Heart is muscular tissue made up of cardiac muscle. It helps in transportation of oxygen in body through blood and also carries deoxygenated blood from the body and transports it to the lungs. This involves the contraction and relaxation of heart. When heart contracts it pumps oxygenated blood into the body and when it is relaxed its chamber is filled with blood. This process is called cardiac cycle. In this, contraction phase is called systole and relaxation phase is called diastole.
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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
#8
Why would your heart rate increase or decrease to help maintain homeostasis when you exercise?
Chapter 34 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 34.1 - How is the now of hemolymph through an open...Ch. 34.1 - Three-chambered hearts with incomplete septa were...Ch. 34.1 - Prob. 3CCCh. 34.2 - Prob. 1CCCh. 34.2 - Why is it important that the AV node delay the...Ch. 34.2 - Prob. 3CCCh. 34.3 - What is the primary cause of the low velocity of...Ch. 34.3 - Prob. 2CCCh. 34.3 - Prob. 3CCCh. 34.4 - Prob. 1CC
Ch. 34.4 - Prob. 2CCCh. 34.4 - Prob. 3CCCh. 34.4 - Prob. 4CCCh. 34.5 - Why is an internal location for gas exchange...Ch. 34.5 - After a heavy rain, earthworms come to the...Ch. 34.5 - MAKE CONNECTIONS Describe similarities in the...Ch. 34.6 - Prob. 1CCCh. 34.6 - Prob. 2CCCh. 34.6 - WHAT IF? If an injury tore a small hole in the...Ch. 34.7 - What determines whether O2, or CO2, undergoes net...Ch. 34.7 - How does the Bohr shift help deliver O2, to very...Ch. 34.7 - Prob. 3CCCh. 34 - Which of the following respiratory systems is not...Ch. 34 - Blood returning to the mammalian heart in a...Ch. 34 - Pulse is a direct measure of A. blood pressure. B....Ch. 34 - Prob. 4TYUCh. 34 - One feature that amphibians and humans have in...Ch. 34 - If a molecule of CO2 released into the blood in...Ch. 34 - Prob. 7TYUCh. 34 - DRAW IT Plot blood pressure against time for one...Ch. 34 - Prob. 9TYUCh. 34 - Prob. 10TYUCh. 34 - Prob. 11TYUCh. 34 - SYNTHESIZE YOUR KNOWLEDGE The diving bell spider...
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- . 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.)…arrow_forwardBased 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.arrow_forwardPls helparrow_forward
- 2. During standard physical activity - 20 squats in 30 seconds. heart rate increases due to the action of the limbic zone of the cortex through the reticulospinal pathway on the primary centers of the sympathetic nervous system. Answer: A. Name the department of the central nervous system where the primary centers of the sympathetic nervous system are located; B. Draw a diagram of the information transmission path from the primary centers of the sympathetic nervous system to the pacemaker of the heart with the participation of sympathetic nerves; C. Name the mediators and cytoreceptors in the ganglionic and nerve-organ synapses of this pathway; show the location of ganglionic and nerve-organ synapses on the diagram with arrows. D. The action of which blocking substance can prevent the appearance of such a reaction? (Explain the answer).arrow_forward8-11. During each heartbeat, the blood from the heart is ejected into the aorta and the pulmonary artery. Since the blood is accelerated during this part of the heartbeat, a force in the opposite direction is exerted on the rest of the body. If a person is placed on a sensitive scale (or other force-measuring device), this reaction force can be measured. An instrument based on this principle is called the ballistocardiograph. Discuss the type of information that might be obtained from measure- ments with a ballistocardiograph, and estimate the magnitude of the forces measured by this instrument.arrow_forwardWhat are you feeling when you feel your pulse? Measure your pulse rate for 10 s and for 1 min. Is there a factor of 6 difference?arrow_forward
- Q4. THROUGH A PROPER DIAGRAMN, EXPLAIN ANATOMY OF THE HEART BLOOD, NERVE AND VENOUS SUPPLY?arrow_forward1 bioarrow_forward24. 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_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_forwardHow does an increase in heart rate contribute to an increase in blood pressure? O It increases the total peripheral resistance as it increases the amount of blood entering the blood vessels per minute. O It increases the cardiac output as this is solely determined by the heart rate. O It increases the cardiac output, as this is determined by the stroke volume and the heart rate. It reduces the cardiac output, as this is inversely proportional to the heart rate. O It increases the stroke volume as it will cause an increase the force of contraction of the heart.arrow_forwardTable 2: Resting and Exercising Cardiac Cycle Length, EDV, and ESV Resting Values Exercising Values Cardiac cycle length (msec) EDV(mL) ESV(mL) Cardiac cycle length (msec) EDV(mL) ESV(mL) Subject 1 839 136 68 452 138 35 Subject 2 831 145 73 392 142 33 Subject 3 855 141 68 414 140 35 Averages 000 00 Equations (fx) Use these formulas for making your calculations. Round your answer to the nearest tenth. Averages Add the values from the three subjects; divide by three.arrow_forward
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