Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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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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Chapter 1 Solutions
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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- The contraction phase of the heartbeat is ______; the relaxation phase is _______.arrow_forwardWhich 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_forwardInstant 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_forward
- Blood flow to the skeletal muscles increases with exercise. Explain how the autonomic nervous system mediates the increase in blood flow to skeletal muscles.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
- Should epinephrine or acetylcholine alter the rate of contraction of separated pieces of cardiac tissue? Explain your answer.arrow_forwardSodium-Potassium Pumps (N+/K+ ATPase) are fundamental to your body’s physiological function. What is the connection/importance of this phenomenon in the circulatory system with examples?arrow_forwardThe ANS regulation of blood pressure is involuntary, yet biofeedback techniques enable individuals to reduce their pulse rate and blood pressure. Explain how this occurs.arrow_forward
- Diagram electrical conduction of the heart and discuss each component (SA node, AV node, etc). How does this dictate the fluidity of heart contraction? Why does the SA always start the conduction? What is the inherent rate of depolarization of the SA node (this means that if the nervous system was shut off what would resting bpm be)? If it is damaged what happens to the electrical conduction system?arrow_forwardWhat is the role of Ca2+ in the shape and duration of an action potential. (Cardiac muscle cell)arrow_forwardExplain in one two lines, how body temperature affects the pulse rate?arrow_forward
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