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National 4 Science. Human Health Physiological measurements of lungs Tidal volume and Peak Flow. Tidal volume and peak flow. What is tidal volume? What factors affect tidal volume? How is tidal volume measured? What is peak flow? How is peak flow measured?

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National 4 science

National 4 Science

Human Health

Physiological measurements of lungs

Tidal volume and Peak Flow


Tidal volume and peak flow

Tidal volume and peak flow

  • What is tidal volume?

  • What factors affect tidal volume?

  • How is tidal volume measured?

  • What is peak flow?

  • How is peak flow measured?

  • What is peak flow used to indicate?


What is tidal volume

What is tidal volume?

  • Tidal volume is the volume of air breathed in OR out of the lungs in one normal breath


Questions

Questions

  • Are the lungs ever empty?

  • What evidence is there form the graph to support your answer?

  • Collect cut out

  • Answer the following:

  • 1. What is the persons vital capacity?

  • 2. What is the persons tidal volume?

  • 3. What is the persons residual volume?


What is peak flow

What is peak flow?

  • Peak flow is the maximum rate at which air can be forced out of the lungs


How is peak flow measured

How is peak flow measured?

  • Peak flow is measured using a peak flow meter


Measure your peak flow

Measure your peak flow

  • Make sure the pointer is at ‘0’

  • Take in a deep breath

  • Blow into the mouthpiece as hard and as fast as you can

  • Take the reading and record in the table

  • Repeat the process another two times

  • Your peak flow is the highest reading you take


Peak flow table

Peak flow table


What is peak flow used to detect

What is peak flow used to detect?

  • Peak flow is used to diagnose asthma

  • People with asthma have a significantly lower peak flow reading than the average person

  • People with asthma or other lung conditions have narrower airways therefore have difficulty breathing

  • Asthma sufferers use inhalers to control their condition


Questions1

Questions

  • What is tidal volume?

  • What factors affect tidal volume?

  • How is tidal volume measured?

  • What is peak flow?

  • How is peak flow measured?

  • What is peak flow used to indicate?


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