Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 15, Problem 3ILQ
Read this article (http://openstaxcollege.org/l/strokespell) to learn about a teenager who experiences a series of spells that suggest a stroke. He undergoes endless tests and seeks input from multiple doctors. In the end, one expert, one question, and a simple blood pressure cuff answers the question. Why would the heart have to beat faster when the teenager changes his body position from lying down to sitting, and then to standing?
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Which of the following characteristics is NOT a property of cardiac muscles?
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involuntary control
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Mary is a 55-year old overweight woman who has poor diet and does not exercise. One day while walking up the stairs she felt sharp pain in the left side of her chest, neck and in left arm. Her doctor told her that she experienced heart pain (angina) due to possible heart problems and needs to get some test done. While she is waiting for the results of her tests Mary asks you why she was feeling pain in her arm and neck if the problem was with her heart. Explain using appropriate physiological and anatomical details.
List everything that would happen if the cardiac muscles turned into skeletal muscles.
Chapter 15 Solutions
Anatomy & Physiology
Ch. 15 - Watch this video...Ch. 15 - Watch this video...Ch. 15 - Read this article...Ch. 15 - Watch this video...Ch. 15 - Watch this video...Ch. 15 - Watch this video...Ch. 15 - Which of these physiological changes would not be...Ch. 15 - Which type of fiber could be considered the...Ch. 15 - Which signaling molecule is most likely...Ch. 15 - Which of these cranial nerves contains...
Ch. 15 - Which of the following is not a target of a...Ch. 15 - Which of the following represents a sensory input...Ch. 15 - What is the term for a reflex that does not...Ch. 15 - What neurotransmitter will result in constriction...Ch. 15 - What gland produces a secretion that causes...Ch. 15 - Which of the following is an incorrect pairing?...Ch. 15 - Which of these locations in the forebrain is the...Ch. 15 - Which nerve projects to the hypothalamus to...Ch. 15 - What region of the limbic lobe is responsible for...Ch. 15 - What is another name for the preganglionic...Ch. 15 - What central fiber tract connects forebrain and...Ch. 15 - A drag that affects both divisions of the...Ch. 15 - A drug is called an agonist if it ________. blocks...Ch. 15 - Which type of drug would be an antidote to...Ch. 15 - Which kind of ding would have anti-anxiety...Ch. 15 - Which type of drug could be used to treat asthma...Ch. 15 - In the context of a lioness hunting on the...Ch. 15 - A target effector, such as the heart, receives...Ch. 15 - Damage to internal organs will present as pain...Ch. 15 - Medical practice is paying more attention to the...Ch. 15 - Horners syndrome is a condition that presents with...Ch. 15 - The cardiovascular center is responsible for...Ch. 15 - Why does smoking increase the risk of heart...Ch. 15 - Why might topical, cosmetic application of...
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- A pithed frog in which the brain and spinal cord are severed is technically dead but some of its organs such as heart, continue to function for some time. An experiment was performed on a pithed frog. After recording the normal heartbeats (normal cardiogram or sinus rhythm), a ligature (ie. tying) is applied between the sinus venosus and right auricle. (Sinus venosus is the pacemaker in amphibian heart). It is the first ligature (I ligature). After a while, a second ligature is applied between auricles and ventricle (II ligature). The heart rates record is shown below. What can we learn from this experiment about the rhythmicity of our cardiac muscle? List THREE points. A в 5 sec 5 sec 5 sec I ligature Il ligaturearrow_forwardCycling is a form of exercise known to increase the heart rate. For cycling, four incline levels typically determine how much more intense you would like the workout to be. Level one is a walking pace, two is slightly more difficult, three is like cycling up a hill, and four is the most intense like cycling up a mountain. I will test the heart rate to see how it increases or decreases depending on each incline level. The moderate activity would be levels one and two, while the strenuous activity would be levels three and four. Before beginning the exercise, I will sit on the bike in a resting position to get my resting heart rate. Then I will start the stopwatch on the bike that records my cycling time, heart rate, and RPM (revolutions per minute). I will start at level one for five minutes and then record my heart rate after the session. I will rest for five minutes and then repeat the same process for each incline level (three more times; four in total). What may be the…arrow_forwardCardiac muscles differ from skeletal muscles in that they.arrow_forward
- Your patient just took up jogging in the evening for exercise and complains that after a mile or so his left leg begins to hurt. You question him on movements that do or do not evoke pain and find that it is widespread throughout his left lower limb. Based on the location of the constriction of the artery (indicated by the arrow), which movement would you think would be LEAST affected by the reduced arterial blood flow to the concerned muscles? A. Lateral rotation of thigh B. Extension of leg C. Plantar flexion of foot D. Primary flexion of thigh E. Extension of thigharrow_forwardThe role of the bundle of his, bundle branches, and purkinje fibers is to Help conduct the electrical pulse (action potential) to the top of the heart first before allowing the contraction to spread to the atria. Help conduct the electrical pulse (action potential) to the whole ventricle. Help conduct the electrical pulse (action potential) to the bottom of the heart first to allow it to spread from the bottom to the top of the heart. To allow the electrical pulse (action potential) to pause for 0.1s before spreading to the ventricle.arrow_forwardFinally, research and write a description of two medical procedures that can be done for a heart attack.arrow_forward
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- Write the names of the numbered structures on the corresponding lines shown on the image below and add large arrows to the the diagram displaying the direction the nerve impulse will travel from dendrites to the musclearrow_forwardSelect the best answer or answers from the choices given: The activity of the heart depends on intrinsic properties of cardiac muscle and on neural factors. Thus, (a) vagus nerve stimulation of the heart reduces heart rate, (b) sympathetic nerve stimulation of the heart decreases time available for ventricular filling, (c) sympathetic stimulation of the heart increases its forceof contraction, (d) all of the above.arrow_forwardRoberto is a 78-year-old male who has recently been diagnosed with Class III Congestive Heart Failure (CHF). His physician told him that his left ventricle has become stiff and cannot relax. Although there is no current treatment that can “fix” Roberto’s condition, he is prescribed two medications: an ACE inhibitor and beta blockers. Which of these statements is most likely true of Roberto’s current symptoms? He doesn’t experience any symptoms at all at rest or during exercise. He has no symptoms at all during rest, but experiences palpitations, fatigues, and shortness of breath during mild exercise. He experiences fatigue, shortness of breath, and palpitations at rest and is not able to participate in any physical activity.arrow_forward
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