EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 49.4, Problem 2R
Summary Introduction
To review:
The reason why the blood clotting process is known as a cascade.
Introduction:
Blood coagulation or clotting is a process by which the body restricts bleeding from a wounded area. This process also protects the wounded area from bacterial and viral infections. The process of blood coagulation involves multiple steps and is called a coagulation cascade.
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In what respect does blood clotting represent a negativefeedback loop? What part of it is a positive feedback loop?
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Several years ago, the deaths of several airline travelers led to the warning about “economic-class syndrome.” The idea is that economic-class passengers do not have as much leg room as passengers in more expensive seats, so they are more likely to sit essentially motionless for long periods of flights-conditions 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 a plane’s cabin during a long flight may lower the risk that a cloth will form.
Chapter 49 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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- What is ‘clotting of blood’? Write a flow chart showing major events taking place in clotting of blood?arrow_forwardDiagram the clotting pathway beginning with prothrombin?arrow_forwardIf the life span of an erythrocyte is 120 days, how many times a year would a sickle cell patient need to be given a blood transfusion to ensure a unit of healthy erythrocytes at any given time?arrow_forward
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