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# 8.3: Activities and Answer Keys

Difficulty Level: At Grade Created by: CK-12

## Activity 7-1: Pulse Rate

### PLAN

Summary Students measure their pulse rates under different conditions and then compare pulse rates with their classmates'.

Objectives

Students:

\begin{align*}\checkmark\end{align*} measure their own pulse rates.

\begin{align*}\checkmark\end{align*} collect and analyze pulse rate data to compare pulse rates with those of other class members.

Student Materials

• Activity Report
• Clock or watch with a second hand

Teacher Materials

• Clock with a second hand

Hanging a clock with a second hand that everyone can see is helpful.

Estimated Time One \begin{align*}50-\mathrm{minute}\end{align*} period

Interdisciplinary Connections

Math Students can chart and graph the results of pulse rates under the differing conditions that they set up.

Physical Education Students can perform variations on this activity during and after various sports activities.

Prerequisites and Background Information

Students should know the meaning of the words pulse, variable, and prediction. Students should have basic skills in making tables and graphs.

• Review the best ways to record data and to represent those data in tables, graphs, and/or other types of graphic organizers.
• Make sure that students who have conditions such as asthma, which could be exacerbated by vigorous exercise, participate only in activities that are safe for them.

### IMPLEMENT

Introduce Activity 7-1 by demonstrating how to take the pulse using the wrist or the carotid artery.

Discuss the collection of data and how to graph the results.

Steps 1-4

Divide students into lab pairs. Remind them to follow the steps they used in the activities they conducted in this unit. Make sure they develop a materials list, a prediction of the results, procedures for conducting the experiment, and tables, charts, or graphs to demonstrate the results.

Steps 5-8

Make sure students show you their experimental design. Make sure nothing they are proposing is dangerous or requires materials and/or space that is unavailable. If the experimental design can be done effectively in the classroom, guide students in conducting their experiment. Make sure they record the data and present it accurately.

Conclude Activity 7-1 by asking the groups to share the results of their experiments with the class.

### ASSESS

Use data and written responses to questions and teacher observations to assess if students can

\begin{align*}\checkmark\end{align*} measure pulse rates and compare pulse rates of different individuals under different conditions.

\begin{align*}\checkmark\end{align*} collect and analyze pulse rate data.

## Activity 7-1: Pulse Rate - Activity Report Answer Key

• Sample answers to these questions will be provided upon request. Please send an email to teachers-requests@ck12.org to request sample answers.
1. Why do you feel a pulse in an artery and not in a vein?
2. What is the role of arteries?
3. What happened to your pulse rate after you exercised? Explain why exercise affects pulse rate.
4. What do you think would happen if your pulse rate was too fast? What would happen if it was too slow? What prevents this from happening in a healthy body?
• A suggested response will be provided upon request. Please send an email to teachers-requests@ck12.org.

How does exercise help the body maintain good health?

Sources of Stress This activity is a good Journal Writing prompt. After students list some of the factors that create stress in their lives and what helps them to relieve that stress, ask them to write an essay on what they can do to alleviate stress.

Risk Profile Students rate themselves on each of the risk factors presented in Figure 7.8.

• Sample answers to these questions will be provided upon request. Please send an email to teachers-requests@ck12.org to request sample answers.
1. Describe the most common cardiovascular disease.
2. What happens during a heart attack?
3. What is risk?
4. Describe five risk factors for cardiovascular disease and explain what you can do to minimize them.
5. What kind of risk-taker are you? How does your willingness to take risks affect who you are? What isn't so good about being a risk taker in certain situations? What might be the consequences of any risks you are taking?

## Activity 7-1 Report: Pulse Rate (Student Reproducible)

1. Why do you feel a pulse in an artery and not in a vein?

2. What is the role of arteries?

3. What happened to your pulse rate after you exercised? Explain why exercise affects pulse rate.

4. What do you think would happen if your pulse rate was too fast? What would happen if it was too slow? What prevents this from happening in a healthy body?

Remind students that they need not be complacent just because they scored well on the inventory. Healthy habits should be started early, maintained for a lifetime, and shared with friends and family.

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Subjects:
6 , 7 , 8
Date Created:
Feb 23, 2012