Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 2CT
Heavy smokers often develop abnormally high blood pressure. The nicotine in tobacco is a potent vasoconstrictor. Explain the connection between these two facts, including what kind of blood vessels are likely affected.
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Nicotine stimulates both the SA node to increase its firing rate and the myocardium to contract more forcefully, which raises cardiac output. It also causes arteriole vasoconstriction. Given this information, would you expect the blood pressure of a smoker to be relatively higher or lower than that of a nonsmoker? Explain.
Nicotine stimulates the heart and raises cardiac output.It also causes arteriole vasoconstriction. Given thisinformation, would you expect the blood pressure of asmoker to be high or relatively low?
Severe hemorrhage increases peripheral vasoconstriction and heart rate. Why does it cause rapid breathing?
Chapter 7 Solutions
Human Biology (MindTap Course List)
Ch. 7 - List the functions of the cardiovascular system.Ch. 7 - Define a heartbeat, giving the sequence of events...Ch. 7 - What is the difference between the systemic and...Ch. 7 - Prob. 4RQCh. 7 - Prob. 5RQCh. 7 - State the main functions of venules and veins....Ch. 7 - Label the hearts main parts in the diagram below.Ch. 7 - Cells obtain nutrients from and deposit waste into...Ch. 7 - The contraction phase of the heartbeat is ______;...Ch. 7 - Prob. 3SQ
Ch. 7 - In the systemic circuit, the hearts _______ half...Ch. 7 - After you eat, blood passing through the GI tract...Ch. 7 - Prob. 6SQCh. 7 - Prob. 7SQCh. 7 - Prob. 8SQCh. 7 - _____ contraction drives blood through the...Ch. 7 - Match the type of blood vessel with its major...Ch. 7 - Prob. 11SQCh. 7 - A patient suffering from hypertension may receive...Ch. 7 - Heavy smokers often develop abnormally high blood...Ch. 7 - Prob. 3CTCh. 7 - Several years ago the deaths of several airline...
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- There are several types of anemia that are caused by defective erythrocytes. Which of the following functions are most likely affected by anemia? The ability to defend the body against bacteria Transportation of carbon dioxide The ability to stop bleeding by forming blood clots Transportation of hormones throughout the bodyarrow_forwardWomen in the late nineteenth and early twentieth centuries wore whalebone corsets that severely restricted the respiratory and digestive systems. These corsets were worn to have a wasp-like waist. It was quite common for these women to faint—in fact, they had “fainting couches.” Explain the physiological reason for their fainting problems.arrow_forwardGiven: Capillaries are where the magic of gas diffusion happens. Capillaries are approximately 5-10 µm in diameter. Let’s pick an average value of 7.5 µm. A normal value of the diameter of an aortic artery is 15 mm. a. What would the Reynolds number be for blood in each vessel?arrow_forward
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