Human Biology: Concepts and Current Issues
7th Edition
ISBN: 9780321821652
Author: Michael D. Johnson
Publisher: Benjamin Cummings
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Chapter 7, Problem 5CR
Summary Introduction
To review:
The process, by which old or damaged red blood cells (RBCs) and its hemoglobin are removed from the blood.
Introduction:
RBCs are the cellular component of the blood. They arise from certain cells of the red bone marrow. These cells are called stem cells. The life span of RBC is 120 days. After 120 days the old or damaged RBCs are removed by the macrophages in the liver or spleen by phagocytosis process.
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Discussion Questions
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Part A: The Effect of Temperature on Enzyme Activity
Graph the volume of oxygen produced against the temperature of the solution.
How is the oxygen production in 30 seconds related to the rate of the reaction?
At what temperature is the rate of reaction the highest? Lowest? Explain.
Why might the enzyme activity decrease at very high temperatures?
Why might a high fever be dangerous to humans?
What is the optimal temperature for enzymes in the human body?
Part B: The Effect of pH on Enzyme Activity
Graph the volume of oxygen produced against the pH of the solution.
At what pH is the rate of reaction the highest? Lowest? Explain.
Why does changing the pH affect the enzyme activity?
Research the enzyme catalase. What is its function in the human body?
What is the optimal pH for the following enzymes found in the human body? Explain. (catalase, lipase (in your stomach),…
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Discussion Questions:
Part One
Why were the plants kept in the dark prior to the experiment? Why is this important?
Why is it important to boil the leaf?
Explain why it was necessary to use boiling alcohol?
What is the purpose of the iodine?
Part Two
What was the purpose of keeping the leaf in the dark and then covering it with a cardboard cut-out?
What conclusions can you draw from this part of the lab?
Part Three
7. In this experiment what was the purpose of adding the soda lime?
8. Why was a sealed bag placed around each plant?
9. What happened in the control plants?
10. What was the result on photosynthesis?
Part Four
11. Why was a variegated leaf used in this experiment?
!2. What conclusions can you draw about starch production in a variegated leaf?
How did the color differences between the two bacterial species you used in this experiment help you determine if the streak plate method you performed was successful?
Chapter 7 Solutions
Human Biology: Concepts and Current Issues
Ch. 7 - Prob. 1QCCh. 7 - Prob. 2QCCh. 7 - Describe the functions of blood.Ch. 7 - Prob. 2CRCh. 7 - Explain how the production of red blood cells is...Ch. 7 - Prob. 4CRCh. 7 - Prob. 5CRCh. 7 - Prob. 6CRCh. 7 -
7. Describe the mechanism of hemostasis.
Ch. 7 - Prob. 8CR
Ch. 7 - Prob. 9CRCh. 7 - Prob. 10CRCh. 7 - Prob. 1TYCh. 7 - Prob. 2TYCh. 7 - Prob. 3TYCh. 7 - Prob. 4TYCh. 7 - Prob. 5TYCh. 7 -
6. A person with Type A- (A-negative) blood will...Ch. 7 - Prob. 7TYCh. 7 - Prob. 8TYCh. 7 - Prob. 9TYCh. 7 - Prob. 10TYCh. 7 -
11. Which white blood cells are present in the...Ch. 7 - Prob. 12TYCh. 7 - Prob. 13TYCh. 7 - Prob. 14TYCh. 7 - Prob. 15TYCh. 7 - Prob. 1AWKCh. 7 - Prob. 2AWKCh. 7 - Prob. 3AWKCh. 7 - Prob. 4AWKCh. 7 - Prob. 5AWKCh. 7 -
6. Coumadin is an anticoagulant drug that is...
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