27B Heart Rate (HRM)

# 27B Heart Rate (HRM) - Experiment 27B Heart Rate and...

This preview shows pages 1–3. Sign up to view the full content.

Biology with Calculators 27B - 1 Experiment 27B Heart Rate and Physical Fitness The circulatory system is responsible for the internal transport of many vital substances in humans, including oxygen, carbon dioxide, and nutrients. The components of the circulatory system include the heart, blood vessels, and blood. Heartbeats result from electrical stimulation of the heart cells by the pacemaker, located in the inner wall of the right atrium. Although the electrical activity of the pacemaker originates from within the heart, the rhythmic sequence of impulses produced by the pacemaker is influenced by nerves outside the heart. Many things might affect heart rate, including the physical fitness of the individual, the presence of drugs such as caffeine or nicotine in the blood, and the age of the person. As a rule, the maximum heart rate of all individuals of the same age and sex is about the same. However, the time it takes individuals to reach that maximum level while exercising varies greatly. Since physically fit people can deliver a greater volume of blood in a single cardiac cycle than unfit individuals, they can usually sustain a greater work level before reaching the maximum heart rate. Physically fit people not only have less of an increase in their heart rate during exercise, but their heart rate recovers to the resting rate more rapidly than unfit people. In this experiment, you will evaluate your physical fitness. An arbitrary rating system will be used to ÒscoreÓ fitness during a variety of situations. Tests will be made while in a resting position, in a prone position, as well as during and after physical exercise. Important: Do not attempt this experiment if physical exertion will aggravate a health problem. Inform your instructor of any possible health problems that might be affected if you participate in this exercise. 1. MATERIALS LabPro or CBL 2 interface Vernier Heart Rate Monitor TI Graphing Calculator stepping stool, ~18 inches high DataMate program

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
27B - 2 Biology with Calculators Experiment 27B PROCEDURE 1. Each partner in a team will take turns testing and being the test subject. When being tested, your partner should record your data on your lab sheet. 2.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 6

27B Heart Rate (HRM) - Experiment 27B Heart Rate and...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online