EXS 411- EXAM 2 QUESTIONS AND ANSWERS SCORED A+

EXS 411- EXAM 2 QUESTIONS AND ANSWERS SCORED
A+




Cardiorespiratory Fitness (CRF) Answer - The ability of the circulatory and
respiratory systems to supply oxygen to the muscles to perform dynamic
physical activity.


The cardiovascular system is responsible for... Answer - supplying oxygen and
removing waste from the body.


Why does the cell need oxygen? Answer - For cellular respiration!


The cell uses oxygen to break down sugar from food.


What is ATP? Answer - - An energy-bearing molecule composed of carbon,
hydrogen, nitrogen, oxygen, and phosphorus atoms
- Used in all cellular actions requiring energy!


Muscle fibers can produce ATP through what 3 energy systems? Answer -
Creatine Phosphate


Fast Glycolysis


Oxidative Phosphorylation

, *Creatine Phosphate*
- Process?
- ATP yield? Answer - - Rephosphorylation of ATP:
- ADP + CP (high energy) ==> ATP + P
- ATP yield = 1 per cycle


*Fast (Anaerobic) Glycolysis*
- Process?
- ATP yield? Answer - - Glucose ==> pyruvate or lactate
- ATP yield = 2 (glucose) or 3 (glycogen)


*Oxidative Phosphorylation*
- Process?
- ATP yield?
- Where does it take place? Answer - - Krebs cycle and electron transport chain
- ATP yield = 38 or 39
- Occurs in mitochondria


Submaximal Exercise Answer - VO2 is proportional to workload.
Steady state


*Fick Equation*
- What is it?
- What is the equation? Answer - - Used to calculate VO2max
- VO2max = (HR max) x (SV max) x (a-O2 diff max)