EBK HUMAN PHYSIOLOGY
15th Edition
ISBN: 9781260163049
Author: Fox
Publisher: MCGRAW HILL BOOK COMPANY
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Question
Chapter 1, Problem 22RA
Summary Introduction
To review:
The effect on rate and strength of a person due to rapid drop in blood pressure.
Introduction:
Hypotension or low blood pressure is the lowering of blood pressure to such a level that it results in an inadequate flow of blood to the organs of the body. The cause of a sudden drop in blood pressure can be dehydration, changing body position suddenly, and severe loss of blood. Low blood pressure results in fainting, dizziness, and lightheadedness.
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Students have asked these similar questions
If you are to graph pulse rate in respinse to your active body activites, how will the graph look like. Cite a specific example of your body activity.
Why, in physiological terms, does heart rate increase during exercise? Discuss contributions from the nervous and endocrine systems.
Describe in detail the negative feedback mechanism that regulates blood pressure.
ANSWER SHOULD INCLUDE:
Cardiovascular system response to a fall IN BP:
Name location of receptors
Afferent pathway - how signal is sent to CNS ( i.e. branch of ANS involved, name of neurotransmitters/ hormone)
Name and location of control of control centre in CNS
Efferent pathway - how signals is sent to effectors .
Name and location of effectors
How effected bring about change in BP
LINK to BP equation
Cardiovascular system response to a rise in BP ( AS BOVE )
Chapter 1 Solutions
EBK HUMAN PHYSIOLOGY
Ch. 1 - How has the study of physiology aided, and been...Ch. 1 - Describe the steps involved in the scientific...Ch. 1 - Describe the different types of trials a new drug...Ch. 1 - Define homeostasis and describe how this concept...Ch. 1 - Define negative feedback and explain how it....Ch. 1 - Prob. 4CPCh. 1 - Explain how the secretion of a hormone is...Ch. 1 - List the four primary tissues and describe the...Ch. 1 - Compare and contrast the three types of muscle...Ch. 1 - Describe the different types of epithelial...
Ch. 1 - Prob. 7aCPCh. 1 - Describe the different types of connective tissues...Ch. 1 - State the location of each type of primary tissue...Ch. 1 - Describe the functions of nervous, muscle, and...Ch. 1 - Describe the functions of the epidermis and...Ch. 1 - Prob. 9CPCh. 1 - Glands are derived from...Ch. 1 - Cells joined tightly together are characteristic...Ch. 1 - Cells are separated by large extracellular spaces...Ch. 1 - Blood vessels and nerves are usually located...Ch. 1 - Most organs are composed of...Ch. 1 - Sweat is secreted by exocrine glands. This means...Ch. 1 - Which of these statements about homeostasis is...Ch. 1 - In a negative feedback loop, the effector produces...Ch. 1 - A hormone called parathyroid hormone acts to help...Ch. 1 - Which of these consists of dense parallel...Ch. 1 - Prob. 11RACh. 1 - Prob. 12RACh. 1 - Describe the structure of the various epithelial...Ch. 1 - Compare bone, blood, and the dermis of the skin in...Ch. 1 - Describe the role of antagonistic negative...Ch. 1 - Using insulin as an example, explain how the...Ch. 1 - Describe the steps in the development of...Ch. 1 - Why is Claude Bernard considered the father of...Ch. 1 - Prob. 19RACh. 1 - Prob. 20RACh. 1 - Why are interactions between the body-fluid...Ch. 1 - Prob. 22RACh. 1 - Give examples of adult stem cells and explain...Ch. 1 - Prob. 24RACh. 1 - Prob. 25RACh. 1 - Prob. 26RA
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Similar questions
- When you are cold, your blood vessels contract. However, your heart rate and blood pressure increases. Explain. What is the physiological function of increasing heart rate?arrow_forwardwhich is more important in blood pressure regulation heart or kidney? give specific reasons whyarrow_forwardAfter exercising many of you saw an INCREASE in the amplitude of the pulse transducer suggesting vasodilation in the musculature AND an increase in heart rate. Which of the following combinations or regulatory factors explains this curious (but common) combination of physiological responses. Sympathetic NS increases vasodilation and increases heart rate Parasympathetic NS increases vasodilation and increases heart rate Parasympathetic NS increases vasodilation and sympathetic NS increases heart rate Local paracrine factors increase vasodilation and Frank-Starling effect increases heart rate Local paracrine factors increase vasodilation and Sympathetic NS increases heart ratearrow_forward
- Which statement about activation of heart muscle cells is TRUE? A when a person is resting only a few small motor units in each ventricle are activated in each heartbeat B all of the muscle cells in the ventricles depolarize and contract together because they are connected by gap junctions C motor neurons must synapse with all of the muscle cells in the ventricles at the same time or fibrillation will occur D all of the heart muscle cells have unstable resting membrane potenitals and slowly depolarize to threshold at the same ratearrow_forwardWhich of the following statements best describes the differences in the regulation of cardiac and skeletal muscle contraction? The amount of contractile force actively generated by muscle cells is increased by stretch in skeletal muscle and decreased by stretch in cardiac muscle. Cardiac muscle is stimulated by motor neurons and skeletal muscle by neurones from the autonomic nervous system. Skeletal muscle contractile force is augmented by increasing the firing frequency of action potentials whereas cardiac muscle contractile force is enhanced by noradrenaline increasing calcium influx through ion channels. Ryanodine receptors in skeletal muscle are opened by a mechanism that requires calcium influx whereas in cardiac muscle membrane depolarisation alone without calcium influx is sufficient to open ryanodine receptors.arrow_forwardThe contraction phase of the heartbeat is ______; the relaxation phase is _______.arrow_forward
- Instant noodle and kimchi are the main sources of food that caused hypertension in Japan. The high salt-intake diet promotes the secretion of hormone by heart and adrenal cortex. How the body overcome this situation to maintain a normal blood pressure?arrow_forwardDrugs known as calcium channel blockers prevent Ca++ movement through Ca++ channels. Explain two ways that this action can lower blood pressure. Why are neurons and other cells unaffected by these drugs?arrow_forwardBlood flow to the skeletal muscles increases with exercise. Explain how the autonomic nervous system mediates the increase in blood flow to skeletal muscles.arrow_forward
- An animal has a pulse that must be triggered by the brain. What type of pulse does this animal have?arrow_forwardDuring vigorous exercise, vasoconstriction occurs in the digestive organs, while vasodilation occurs in the heart. Why would this be beneficial during rigorous exercise?arrow_forwardCells in the body have the ability to undergo a transiet depolarization and repolarization. A. Plot the action potential of non-pacemaker cardiac myocyte and indicate what kinds of ion channels involved in each phase and compare ion movement during a myocardial cell's action potential to ion movement of a neuron's action potential. B.Explain why contractions in the cardiac muscle cells are different to skeletal muscle cells.arrow_forward
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