Featured in PASCO’s Biology through Inquiry Teacher Guide

Biology through Inquiry Teacher Guide

(PS-2870C)

Features 25 inquiry based labs covering the fundamental concepts of cell biology, ecology and physiology.

EKG Factors & the Heart

Lab Summary

Use an EKG sensor to measure and observe the electrical activity of the heart muscle.

Theory

Students measure and observe the electrical activity of the heart muscle using an electrocardiogram (EKG) sensor:

  • Determine the duration of three intervals of Voltage versus Time for the EKG before and after exercise.
  • Compare the time intervals for the EKG before and after exercise for males and females.
  • Propose other factors in addition to activity level that may affect the EKG time intervals.

Downloads

  • EKG Factors Sample Lab (782 KB – PDF)
  • Method

    Students gain experience conducting the following procedures:

    • Use the EKG sensor to measure the electrical current associated with heart contractions.
    • Record and display heart voltage signals from the EKG.
    • Determine the PR interval duration at rest and after exercise.
    • Determine the QRS complex duration at rest and after exercise.
    • Determine the QT interval duration at rest and after exercise.

    Sensors / Equipment Used:

    PASPORT EKG Sensor

    (PS-2111)

    A safe, effective and simple way to measure both EKG and heart rate. PASPORT version.

    Materials Used:

    Electrode patches (included with sensor)

    The Associated Bundle:

    Physiology Expansion Sensor Bundle

    (PS-2935)

    This expansion bundle contains the probeware needed to perform the 5 physiology activities in the Biology through Inquiry lab manual.

    Interface Required

    This experiment may require software and an interface for data collection.