17B gas exchange

1. Name ____________________________________ Date____________ Class_______
Activity 17B: Gas Exchange October 27, 2010
1. Getting Started: Complete “Anticipation Guide: Gas Exchange”.

2. 2. Read and summarize pg.B-38 in one sentence.
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3. CHALLENGE Question: How much carbon dioxide is in your exhaled breath? Rewrite the
challenge question in your own words
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4. Place the following terms into your glossary. Key Words: control, indicator, function. Organ,
qualitative/quantitative data, range, respiratory system, structure
5. Procedures: Read and summarize Part A pg B-39. Then write a one sentence explanation of the
procedures.
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3. 6. Below is the data table you need to complete for this activity. Notice how the Independent
variable is on the right-hand side of the table and the dependent variable is on the left-hand
side of the table.
Table 1: The Relationship between various solutions and the presence of Carbon
dioxide.
Cup Initial BTB Color Final BTB Color After Adding BTB
A (Control)
B (Air)
C (Sodium
Hydroxide)
D (exhaled breath)
E partner’s
exhaled breath)
7. Analysis Questions
i. What is the purpose of the solution in Cup A?
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ii. Which of the solutions in Part A contained carbon dioxide? Support your answer with
evidence from your experimental results.
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4. iii. What does this tell you about the exhaled breath of human beings?
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iv. Look at the table on page B-43. Compare the composition of air you breathe in to that
of air you breathe out. Describe the differences.
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8. Procedures: Read and summarize Part B g B-40. Then write a one sentence explanation of
the procedures.
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5. 9. Below is the data table you need to complete for this activity. Notice how the Independent
variable is on the right-hand side of the table and the dependent variable is on the left-hand
side of the table.
The relationship between students and the amount of carbon dioxide in their
breath.
Number of drops Number of people
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

6. 30
10. Draw a bar graph and label the axis. Remember, IV goes on the X-axis and the DV goes on
the Y-axis. The bottom of the graph is a larger box so you can write the number of people
side-ways with enough space.
11. Analysis Questions
i. What was the range of carbon dioxide in exhaled breath (as measured by drops of
sodium hydroxide)?
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7. ii. Look at the diagram of the human respiratory system. Considering all the oxygen that
has to get into your blood and all the carbon dioxide that has to escape from your
blood, why do you think the inside of the lung is structured the way it is?
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iii. Were the data collected in Part A qualitative or quantitative?
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iv. Were the data collected in Part B qualitative or quantitative?
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12. Extra Credit: You must have everything else completed to earn extra credit. You must also
have not been given silent lunch or have been removed from class.
i. Look carefully at the diagram of the human respiratory system. What are some of the
important structures in the respiratory system?
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ii. Explain where gases are exchanged within the respiratory system
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iii. Be sure to explain how the activity provided evidence for your intial ideas or caused
you to change your thinking.
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8. 13. Homework: Many respiratory diseases limit a person’s capacity to exchange oxygen. One of
these diseases is pneumonia, which causes the alveoli to fill up with fluid. Another is
pleurisy, which is an inflammation of the lining of the lung, making it painful to inhale and
exhale. Explain how you believe these diseases may affect your ability to breath.
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