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Chapter 6

BPK 143 Chapter Notes - Chapter 6: Muscle Fatigue, Skeletal Muscle, Phosphagen

Biomedical Physio & Kines
Course Code
BPK 143
Tony Leyland

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1. Define the terms aerobic and anaerobic.
- Anaerobic chemical processes that do not require the presence of oxygen
delivered by the blood
- Aerobic processes that do require the presence of oxygen
2. What is ATP?
- The only immediate energy source for muscle contraction
3. What is the immediate energy source for muscle contraction?
4. Describe the Principle of Coupled Reactions.
- The energy released by one chemical reaction is used to drive another chemical
5. What is the most important variable in determining which energy system is being
utilised? Why?
6. Compare and contrast the aerobic and anaerobic breakdown of muscle glycogen. Include
as much detail as possible in your answer.
7. What are mitochondria?
- Sub-cellular structures where most of the ATP in all cells are produced
8. Summarise the steps in the oxidation of fat.
- Fatfatty acids beta oxidationAcetyl-CoAKrebs cycle electron
transport chain+O2CO2+H2O+ATP
9. Briefly describe the role protein plays in exercise metabolism.
- Protein is needed to repair injuries to muscle fibres and to remodel muscle tissue
in response to strength training.
- Also, endurance activities cause protein to breakdown and used as fuel
10. How can one determine which energy systems predominate in any sport or activity?
- The intensity of the sport/activity
11. Search some coaching books, the web or other information sources to find a time-
intensity motion study for a sport other than soccer. What is the predominant energy
system of systems used by athletes in these sports? Justify you answer.
- Phosphagen, because, players are often needed to sprint, jump, and shoot which
require short, explosive power.
12. What are the primary metabolic demands of the following sports? Use the terms high,
medium and low to describe the involvement of each energy system.
o marathon running
o baseball
o springboard diving
o soccer
o volleyball
13. What are the five predominant areas of the energy continuum discussed in lecture? Give
the approximate duration of these areas and name one event or sport that relies heavily
on this area.
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