EBK BIOLOGY:SCIENCE F/LIFE
6th Edition
ISBN: 9780134819167
Author: BELK
Publisher: PEARSON
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Textbook Question
Chapter 20, Problem 1AAATB
Some endurance athletes, such as cyclists, engage in the practice of “blood doping,” in which packed red blood cells are transfused into their bloodstream immediately before an event. How might increasing the volume of red blood cells provide an advantage to an athlete? What do you think could be the risks of this practice?
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Watch this video (http://openstaxcollege.org/l/doping)to see doctors discuss the dangers of blood doping in sports.What are the some potential side effects of blood doping?
An example of feedback is seen in blood clotting. Part of the complex biochemical pathway of clotting is the production of an enzyme that forms the
matrix of the blood clot, but also speeds up the production of still more thrombin. That is, it has a self-catalytic, self-accelerating effect, so that once the
clotting process begins, it runs faster and faster until, ideally, bleeding stops. Thus, this positive feedback loop is part of a larger negative feedback loop,
one that is activated by bleeding and ultimately works to stop the bleeding.
So ultimately in keeping homeostasis, which of the following is true:
This is a positive feedback loop
This is a negative feedback loop
You are watching track and field competition at the Olympics. The announcer mentions that the whole team from one of the countries was disqualified because they were using blood doping. You friends who watched TV with you ask you what “blood doping” is. Explain biological principles behind two types of blood doping and possible side effects of these procedures. Give your opinion if blood doping should or should not be considered “natural” and allowed in competitive sports.
Chapter 20 Solutions
EBK BIOLOGY:SCIENCE F/LIFE
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- Hyperglycemia associated with diabetes promotes a prothrombotic state by affecting a number of different steps in the clotting pathway. Which of the following would result in more rather than less clotting? Check all that apply. The correct answers reflect the effect of hyperglycemia on the clotting pathway! less conversion of plasminogen to plasmin 7 000000000 abnormally low number of platelets platelets more sensitive to thromboxane A2 elevated conversion of plasminogen to plasmin platelets less sensitive to thromboxane A2 low sensitivity to NO and PGI2 increased prothrombin in the blood increased amount of fibrinogen in the blood less prothrombin in the blood abnormally high number of platelets less fibrinogen in the blood high sensitivity to NO and PGI2arrow_forwardBlood doping used to be an illegal practice where extra red blood cells are given to an athlete to increase oxygen carrying capacity immediately before a race. Adverse (bad) effects of doping would include: increased blood viscosity increased blood pressure increased work on the heart all of thesearrow_forwardWhich cell(s) can bind to oxygen and carbon dioxide? Select one or more: a.myloid stem cells b.thrombocytes c.erythrocytes d.pluripotent stem cells e.pluripotent stem cellsarrow_forward
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