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BIOL 101 Activity Sheet Lab 9 Scientific Method Used to Examine the Regulation of Human Heart Rate

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BIOL-101 Activity 1 Sheet- Measuring Heart Rate Name: __________________
Activity Part 1: Learn how to measure your own heart rate accurately from the radial pulse in your
wrist.
Record your own resting heart rate values below:
RHR Attempt #1: __________________
RHR Attempt #2: __________________
RHR Attempt #3: __________________
Additional Attempts (if needed):
#4:_________________________ #5: ______________________ #6:________________________
Activity Part 2: Measuring the heart rate of others accurately from the radial pulse in their wrist.
Record your resting heart rate measurements for the other three members of your group:
Name of Student #1: ____________________ RHR Student #1: __________________
Name of Student #2: ____________________ RHR Student #2: __________________
Name of Student #3: ____________________ RHR Student #3: __________________
Record your other group members results for each student (including you) in the table below. Write the name of
each other student in the box
Table 1: Resting heart rate values measured by each student in your group.
Student Doing the Measurement
RHR for You
RHR for
Student #1 -
RHR for
Student #2 -
RHR for
Student #3-
You
NA
Student #1 -
NA
Student #2 -
NA
Student #3-
NA
Compare the RHR values measured for each student. If the three numbers are +/- 2 pulses in 30 seconds
different from each other, you should repeat the procedure until you can all come within +/- 2 pulses in 30 of
the same number.
These RHR values will be used as a comparison for your experimental testing conditions in Parts 3 and 4.

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Activity Part 3: Designing your experiment
1. Write down the experimental idea you want to test in the space below. Note: These ideas and
descriptions should be included in your formal lab report introduction section.
Example: Exercise is known to increase heart rate. We want to test if the intensity of the exercise can
influence the extent at which the heart rate increases. Therefore, we are going to test the changes to heart
rate between a moderate amount of activity and a more strenuous amount of activity. To do so, we will
examine different ways to go up and down a flight of steps. The moderate activity will be to walk up and
down a flight of steps, while the strenuous activity will be to run up and down a flight of steps.
2. Write a hypothesis/prediction statement for your experimental idea in the space below. This hypothesis
should be formatted in an “If, then” statement. Your hypothesis statement should look like the “testable
prediction” in section 1.7 of your textbook.
Example: If exercise increases heart rate, then a person who conducts a more strenuous activity like
running up and down a flight of stairs will have a larger increase in heart rate from their RHR than a
person who conducts a more moderate activity like walking up and down a flight of stairs.
3. Write a list of materials needed for your experiment below.
Example:
Materials: stop watch, flight of stairs that goes between floors 2 and 3.

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BIOL-101 Activity 1 Sheet- Measuring Heart Rate Name: __________________ Activity Part 1: Learn how to measure your own heart rate accurately from the radial pulse in your wrist. Record your own resting heart rate values below: RHR Attempt #1: __________________ RHR Attempt #2: __________________ RHR Attempt #3: __________________ Additional Attempts (if needed): #4:_________________________ #5: ______________________ #6:________________________ Activity Part 2: Measuring the heart rate of others accurately from the radial pulse in their wrist. Record your resting heart rate measurements for the other three members of your group: Name of Student #1: ____________________ RHR Student #1: __________________ Name of Student #2: ____________________ RHR Student #2: __________________ Name of Student #3: ____________________ RHR Student #3: __________________ Record your other group members results for each student (including you) in the table below. Write the name of each other student in the box Table 1: Resting heart rate values measured by each student in your group. Student Doing the Measurement RHR for You You Student #1 Student #2 Student #3- NA RHR for Student #1 - RHR for Student #2 - RHR for Student #3- NA NA NA Compare the RHR values measured for each student. If the three numbers are +/- 2 pulses in 30 seconds different from each other, you should repeat the procedure until you can all come within +/- 2 pulses in 30 of the same number. These RHR valu ...
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