Metabolism and Bioenergetics

Question 1

Provides energy for high intensity, short duration exercise

Answer 1

ATP-PC system; supplies energy for 10-15 seconds; very rapid onset; creates 1 ATP molecule

Question 2

Provides energy for 30-50 seconds of duration

Answer 2

Glycolysis; produces either lactic acid (anaerobic) or pyruvate (aerobic); enough for typical 8-12 rep set

Question 3

beta oxidation

Answer 3

breakdown of triglycerides to produce FFA’s to convert into acyl-CoA for the Krebs cycle and production of ATP

Question 4

Source of long-term energy production

Answer 4

Oxidative system (aerobic)

Question 5

Process of energy production over time of exercise

Answer 5

first ATP-PC system for first 30 sec, switching to anaerobic glycolysis, and then beyond 2 minutes progressively more to aerobic/oxidative systems

Question 6

Respiratory quotient

Answer 6

expired CO2/O2 consumed; RQ 1.0 = all CHO being burned; RQ 0.7 = fat is 100% of fuel.