Biology 105
Biology of Exercise
Spring 2003
1/17/03 - Post- class outline
Learning objectives:
- How is a constant internal environment (homeostasis) maintained
in the face of the stress of exercise?
- What limits exercise?
How is a constant internal environment (homeostasis) maintained in the
face of the stress of exercise?
- Homeostasis - maintenance of a constant internal environment.
- Challenges to homeostasis during exercise
- internal
- increased temperature
- decreased oxygen levels
- decreased fuel (i.e. glucose) availability
- decreased ATP
- increased carbon dioxide
- external
- temperature (increased or decreased)
- altitude
- diving (oxygen availability)
- mechanical stress
- Reflexes
- Negative feedback loops
- Negative feedback demonstration
What limits exercise?
- When the body can no longer maintain homeostasis, fatigue is usually the
result.
Where is homeostasis maintained?
- intracellular space - space inside cells
- extracellular space - space outside cells
