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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A patient with heart disease experiences pain at the base of the neck and in the left shoulder and upper limb during exercise. How would you explain the likely origin of this pain to the patient?
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Which of the following would NOT result from an increase in sympathetic stimulation of the heart?
A
increased force of ventricular contraction
B
increased calcium concentration in the fluid surrounding the actin and myosin during contraction
C
increased heart rate
D
increased number of motor units activated
E
increased cardiac output
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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- Epinephrine is the chief neurotransmitter of the sympathetic nervous system. What effect would you expect it to have on the contractions of cardiac muscle? Explain.arrow_forwardFill in the blank: Endings of parasympathetic nerve fibers secrete _______________________, which causes the heart rate todecrease.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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- In response to a severe hemorrhage, blood pressure lowers, the heart rate increases dramatically, and the stroke volume lowers. If low blood pressure activates a reflex that increases sympathetic stimulation of the heart, why is the stroke volume low?arrow_forwardSympathetic stimulation increases the phosphorylation of the Ca2+ATPase in the sarcoplasmic reticulum. What effect does this have on cardiac function? It increases the rate of diastole It decreases the stretch of the ventricles The rate of systole decreasesarrow_forwardDiscuss the baroreceptor reflex and explain its influence on blood pressure and heart rate.arrow_forward
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