Graphing Heart Rate

Using the information in the data table, construct a line graph on the grid provided, following the directions below. 1. Mark an appropriate scale on each labeled axis. 2. Plot the data for the average heart rate on the grid. Surround each point with a small circle and connect the points. 4. State the relationship between temperature and heart rate in water fleas. _______________________________

• The heart rate increases with temperature.

• The heart rate decreases with temperature.

• The heart rate remains constant with temperature.

• There is no clear relationship between heart rate and temperature.

Which statement is best supported by the graph?

• A. Before exercising, the average pulse rate was 65; four minutes after exercising, the average pulse rate was 65.

• B. After four minutes of exercising, the average pulse rate was 120; two minutes after exercising, the average pulse rate was 120.

• C. While exercising, the highest average pulse rate was 150; before exercising, the average pulse rate was 65.

• D. Two minutes before exercising, the average pulse rate was 80; after two minutes of exercise, the average pulse rate was 140.

Students were asked to design a lab that investigated the relationship between exercise and heart rate. Heart rate was determined by recording the pulse rate in beats per minute. The students hypothesized that increased exercise results in an increased heart rate. The class results for the experiment are shown in the graph below. Students in a different science class carried out the same experiment. The data they obtained did not support the hypothesis that increased exercise results in increased heart rate. The most scientifically sound way to deal with this situation is to

• write a new hypothesis

• read about pulse rate in a biology textbook

• have the students in both classes vote to decide which hypothesis is correct

• ask students in a third class to do the experiment and see if their results support the hypothesis

The change in heart rate that occurs between 1 and 5 minutes of exercise is an adaptation that

• reduces the rate at which oxygen is carried to the muscle cells

• increases the rate at which carbon dioxide is carried to the muscle cells

• results in the production of more ATP in muscle cells

• slows the destruction of enzymes involved in respiration of muscle cells

Using the information in the data table, construct a line graph on the grid provided, following the directions below. 1. Mark an appropriate scale on each labeled axis. 2. Plot the data for the average heart rate on the grid. Surround each point with a small circle and connect the points.

• What is the first step in constructing the line graph?

• What should you do after marking the scale on each axis?

• How should each data point be represented on the graph?

• What is the final step in plotting the data?

The independent variable in this investigation is the:

• number of trials

• number of water fleas

• temperature of the water

• average heart rate.

4. State the relationship between temperature and heart rate in water fleas.

• As temperature increases, heart rate increases.

• As temperature increases, heart rate decreases.

• Temperature has no effect on heart rate.

• Heart rate is highest at moderate temperatures.

Students were asked to design a lab that investigated the relationship between exercise and heart rate. Heart rate was determined by recording the pulse rate in beats per minute. The students hypothesized that increased exercise results in an increased heart rate. The class results for the experiment are shown in the graph below. Which statement is best supported by the graph?

• A. Before exercising, the average pulse rate was 65; four minutes after exercising, the average pulse rate was 65.

• B. After four minutes of exercising, the average pulse rate was 120; two minutes after exercising, the average pulse rate was 120.

• C. While exercising, the highest average pulse rate was 150; before exercising, the average pulse rate was 65.

• D. Two minutes before exercising, the average pulse rate was 80; after two minutes of exercise, the average pulse rate was 140.

Students were asked to design a lab that investigated the relationship between exercise and heart rate. Heart rate was determined by recording the pulse rate in beats per minute. The students hypothesized that increased exercise results in an increased heart rate. The class results for the experiment are shown in the graph below. Students in a different science class carried out the same experiment. The data they obtained did not support the hypothesis that increased exercise results in increased heart rate. The most scientifically sound way to deal with this situation is to

• write a new hypothesis

• read about pulse rate in a biology textbook

• have the students in both classes vote to decide which hypothesis is correct

• ask students in a third class to do the experiment and see if their results support the hypothesis

The change in heart rate that occurs between 1 and 5 minutes of exercise is an adaptation that

• reduces the rate at which oxygen is carried to the muscle cells

• increases the rate at which carbon dioxide is carried to the muscle cells

• results in the production of more ATP in muscle cells

• slows the destruction of enzymes involved in respiration of muscle cells