Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Question
Chapter 41, Problem 2CCQ
Summary Introduction
To write:
The reason some people faint after donating blood and prevention from fainting.
Introduction:
Blood volume and blood pressure are closely related to each other. If there is a change in blood volume, the arterial pressure is affected as the cardiac output is changed. If there is an increase in blood volume, the central venous pressure also increases.
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- Several years ago the deaths of several airline travelers led to warnings about economy-class syndrome. The idea is that economy-class passengers dont have as much leg room as passengers in more expensive seats, so they are more likely to sit essentially motionless for long periods on flightsconditions that may allow blood to pool and clots to form in the legs. This condition is called deep-vein thrombosis, or DVT. Given what you know about blood flow in the veins, explain why periodically getting up and moving around in the planes cabin during a long flight may lower the risk that a clot will form.arrow_forwardA patient suffering from hypertension may receive drugs that decrease the hearts output, dilate arterioles, or increase urine production. In each case, how would the drug treatment help relieve hypertension?arrow_forwardMatch the type of blood vessel with its major function. _____ arteriesa. diffusion _____ arteriolesb. control of blood distribution _____ capillariesc. transport, blood volume reservoirs _____ veinsd. blood transport and pressure regulatorsarrow_forward
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