10. Why is a countercurrent exchange system a good one to use for exchanging material between an organism's blood and the external environment? A) Because this type of system has the 2 materials flowing in the same direction so that there is always a concentration gradient B) Because this type of system is the only way to obtain sufficient oxygen when using air as a respiratory medium C) Because this type of system is less efficient because it can move a large amount of material with very little energy. D) None of the above E) Because this type of system has the two materials flowing in opposite directions so that there is always a concentration gradient.
10. Why is a countercurrent exchange system a good one to use for exchanging material between an organism's blood and the external environment? A) Because this type of system has the 2 materials flowing in the same direction so that there is always a concentration gradient B) Because this type of system is the only way to obtain sufficient oxygen when using air as a respiratory medium C) Because this type of system is less efficient because it can move a large amount of material with very little energy. D) None of the above E) Because this type of system has the two materials flowing in opposite directions so that there is always a concentration gradient.
Anatomy & Physiology
1st Edition
ISBN:9781938168130
Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Chapter20: The Cardiovascular System: Blood Vessels And Circulation
Section: Chapter Questions
Problem 6RQ: Which of the following best describes veins? thick walled, small lumens, low pressure, lack valves...
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10. Why is a countercurrent exchange system a good one to use for exchanging material between an organism's blood and the external environment?
A) Because this type of system has the 2 materials flowing in the same direction so that there is always a concentration gradient
B) Because this type of system is the only way to obtain sufficient oxygen when using air as a respiratory medium
C) Because this type of system is less efficient because it can move a large amount of material with very little energy.
D) None of the above
E) Because this type of system has the two materials flowing in opposite directions so that there is always a concentration gradient.
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