Exploring the Effects of Exercise on Respiration

Lesson Prep: Using What’s Already There

Internet provides: Opportunities for networking Useful teaching supplements (and some not so useful

ones) Lesson plans, assessment ideas, lab ideas, opportunities

for collaboration with colleagues

Collaboration: Increases lesson effectiveness Enhances communication with students (and

colleagues) Ultimately decreases workload (don’t reinvent the

wheel)

Focus Questions

What are the basic components of the human respiratory system (lecture)?

How does exercise affect the rate of external and internal respiration (lab)?

Human Respiration Entrance Question

Why do we need to respire (aka breathe)?

A. To take in OxygenB. To get rid of CO2

C. To replenish our cells’ energyi. The brain can survive ~6 min w/o blood (aka O2

supply and CO2 removal)ii. Sore muscles = due to lack of O2 supply

D. To maintain blood pHi. Large changes in pH can kill cellsii. CO2 has a big effect on blood pH

Human Respiration

http://www.youtube.com/watch?NR=1&v=HiT621PrrO0

http://www.youtube.com/watch?v=Lygr-rAtHgA&NR=1 Does breathing = respiration?

Why/why not?

http://www.youtube.com/watch?v=xmceP5z6qsA Do we always fill our lungs to capacity?

Let’s Exercise

Supplies: Each team needs

1 small beaker about ½ full of DI water pH meter or 5 pH strips 1 straw (DO NOT SET THIS ON YOUR COUNTERTOP AS YOU

WILL BE BLOWING INTO IT) 1 stopwatch

Follow Lab Instructions Pay attention to the TYPE of breathing you notice as

well (abdominal or thoracic?) PLEASE DON’T OVER-EXERT YOURSELVES, THIS IS

NOT P90X!!!

Human RespirationExit Question

Based on what you observed with breathing rate and CO2, how do you

think exercise affects cellular respiration?

Fun Facts For Teaching

There Are Major Links Between the CardioVascular System and Respiration

Increase in respiration ties to increase in pulse rate, BP, and cardiac output (the amount of blood flowing through the body)

Caffeine increases pulse rate/blood pressure = increases respiratory rate Why would this help you feel more alert?

Living at high altitudes increases INTERNAL respiration

An athlete typically Has a slower stronger heartbeat Has a lower blood pressure due to widened vessels Breathes slower and deeper

= more efficient Has a shorter recovery period than a non-athlete breathing