Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 16RQ
Diagram the three theories that explain why the normal baroreceptor reflex is absent during exercise.
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Describe the changes that occur in skeletal muscle as a result of endurance training. Include a brief discussion on how endurance training improves acid-base balance during exercise. What physiological benefits may happen for an older adult who begins a progressive resistance-training program?
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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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- Describe possible mechanisms for why blood pressure may have a greater change during the Valsalva maneuver during an isometric contraction (plank) versus intense aerobic exercise.arrow_forwardExplain how optimal skeletal muscle force (high muscle tension) can be achieved during a high intensity exercise. (Mention and explain how wave summation, motor recruitment summation, muscle length, and type of muscle fibers activated can affect muscle force).arrow_forwardIdentify the ways that increased IP3 can cause contraction. Identify the ways that increased cAMP production can cause relaxation.arrow_forward
- Explain the source of signals detected by EMG electrodes. What is actually measured. Based on your answer, explain why an EMG recording would increase with increasing strength of the clench. If 2 clenches produced the exact same force of contraction, would the EMG recording also have to be exactly the same? Why or why not?arrow_forwardThe motor unit firing patterns are measured in a human hand muscle using an electromyography (EMG) recording. Which one of the following statements is the best description of the EMG pattern observed as the individual voluntarily attempts to make a low-level force of contraction in the muscle and steadily increases the force of contraction? Low amplitude spikes visible on the EMG trace at low force. Larger amplitude spikes become visible with increasing force of contraction. Low frequency of small amplitude spikes on the EMG trace at low force. Spike frequency and amplitude increase with increasing force. A large single deflection in the trace as the individual contracts the muscle. The deflection gets larger with increasing force. Low frequency of spikes on the EMG trace at low force. The frequency of spikes becomes more frequent with increasing force.arrow_forwardIs there a difference in the time interval from the end of the T wave to the peak of the next R wave during rest and exercise? What does this mean?arrow_forward
- We have looked at exercise from a couple of perspectives now. Of the sets of physiological parameters below, which is a combination of one parameter that increases, one that decreases and one that doesn't change with vigorous exercise in that order? Tidal volume, Inspiratory reserve volume, stroke volume Forced vital capacity, heart rate, cardiac output Hematocrit, forced vital capacity, respiratory rate Stroke volume, expiratory reserve volume, forced vital capacity Heart rate, tidal volume, hematocritarrow_forwardShown below are changes that occur in skeletal muscle during vigorous physical activity. For each parameter, indicate its effect on percent HbO2 saturation (↑,↓) and the amount of free O2 available to the muscle fibers (↑,↓). ↓ Po2 = increase / decrease HbO2 saturation, increase / decrease free O2 ↓ pH = increase / decrease HbO2 saturation, increase / decrease free O2 ↑ Pco2 = increase / decrease HbO2 saturation, increase / decrease free O2 ↑ 2,3-BPG = increase / decrease HbO2 saturation, increase / decrease free O2 ↑ Temperature = increase / decrease HbO2 saturation, increase / decrease free O2arrow_forwardList and describe three changes in muscles that occur duringendurance training and explain how each improves endurance.arrow_forward
- Compare neurochemical changes from acute exercise to neurochemical changes from chronic exercise. Use neurochemical differences in acute and chronic exercise to explain differences in the acute vs chronic effects of high intensity exercise on working memory tasks.arrow_forwardDescribe two types of recommended exercise.arrow_forwardIN 5 sentencecs explain othe physiologic effects and the risks associated with wearing a mask while doing light to moderate exercise as compared to doing heavy exercise like vigorous running or aerobic Zumba.arrow_forward
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KINE 2310-Chapter 4: Philosophy of Physical Activity; Author: HBU Online Course Development;https://www.youtube.com/watch?v=8Ky6t3nvP_4;License: Standard youtube license