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Biology - HOT Science Lab

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Teacher<br />

Circulation <strong>Lab</strong><br />

(Adapted from: Prentice Hall. <strong>Biology</strong> Exploring Life)<br />

NGSSS:<br />

SC.912.L.14.36 Describe the factors affecting blood flow through the cardiovascular system.<br />

(AA)<br />

Purpose of <strong>Lab</strong>/Activity: The purpose of this activity is to:<br />

1. Describe how the sounds of a heart through a stethoscope relate to the stages of a<br />

heartbeat.<br />

2. Observe the relationship between heart rate and exercise.<br />

Prerequisite: Prior to this activity, the student should be able to:<br />

<strong>Lab</strong>el the parts of the heart<br />

Identify and describe the general flow of blood through the circulatory system<br />

Materials (per station or per group):<br />

Stethoscope<br />

Rubbing alcohol<br />

Cotton balls<br />

Stopwatch<br />

Procedures: Day of Activity:<br />

Before<br />

activity:<br />

What the teacher will do:<br />

a. The teacher will have to gather all materials and should trouble shoot the<br />

different heart rate monitors to determine if a constant and realistic heart<br />

rate reading is observed.<br />

b. The teacher will prepare 4 sets of stations, each set focusing on different<br />

stimuli:<br />

1. Exercise, and<br />

2. Baroreceptor stimuli.<br />

c. Engage students by eliciting prior knowledge and asking questions<br />

pertinent for each station:<br />

1. What effect does exercising have on the heart rate<br />

2. How does the heart rate change as a person stands up starting from a<br />

squatting position (This motion produces a sudden increase in the<br />

amount of blood circulation, how does this change affect the heart rate)<br />

d. Review general procedures for using the respiration and heart rate<br />

monitors. It is expected that all students be involved and participate during<br />

the lab. This means that all students must take turns in running the heart<br />

rate monitor or in being the patient who is being monitored. Students need<br />

to know what parts of the body are affected by stimulation of the<br />

sympathetic nervous versus stimulation from the parasympathetic nervous<br />

system.<br />

e. As you start the lab, students need to be sure to have consistent and<br />

realistic heart rates at the beginning of each experiment. Make sure that<br />

students correctly gather and record their data.<br />

<strong>Biology</strong> HSL Page 137<br />

Curriculum and Instruction

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