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Biology - HOT Science Lab

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Teacher<br />

Stimuli Effects on Heart Rate: Sympathetic Stimuli and Coughing<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 lab is to observe how the heart rate changes<br />

according to sympathetic (and parasympathetic) stimuli. The lab includes two separate stations,<br />

each focusing on a different stimulus.<br />

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

Determine the constant breathing rate and constant heart rate<br />

Determine the resting breathing rate and resting heart rate<br />

Know how to get consistent and realistic readings for heart rate<br />

know the function of the sympathetic nervous system and the parasympathetic nervous<br />

system<br />

Relate the cough reflex to heart rate<br />

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

CBL2 with TI 83 calculator<br />

ice water bath<br />

towel<br />

DataMate App<br />

Vernier Respiration Rate Monitor<br />

Vernier Hand-Grip Heart Rate Monitor or Vernier Exercise Heart Rate Monitor<br />

saline solution in dropper bottle for the exercise heart rate monitor<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: (1) Sympathetic stimuli and (2) Coughing.<br />

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

pertinent for each station (e.g., How will the heart rate respond to different<br />

sympathetic stimuli How does coughing (a sympathetic stimulation) affect<br />

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. Students need to be sure to have consistent and realistic heart rates at the<br />

beginning of each experiment.<br />

<strong>Biology</strong> HSL Page 269<br />

Curriculum and Instruction

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