AP BIOLOGY

Detailed explanation-1: -ATP-PC system is predominantly used during maximum intensity activities lasting no longer than 10 seconds. Anaerobic Glycolysis system is predominantly used for high intensity activities lasting approximately 1 minute. Aerobic system is predominantly used during medium to low intensity activity.

Detailed explanation-2: -The ATP-PC system provides an immediate and intense short burst of energy, useful in sports such as 100m sprints, Powerlifting, or throwing events such as the Javelin, Shot Put, or Discus throw, but is only useful for around 10 seconds.

Detailed explanation-3: -The most dominant energy system used by the point guard is the lactic acid system; where up to 60% of game play is spent working anaerobically (BrianMac, 2011). This system is dominant during high intensity efforts which need to continue for up to 90 seconds between 85-95%MHR (Smyth, 2006).

Detailed explanation-4: -The first 10 to 20 seconds of high-intensity physical activity is fueled by the “ATP-CP, ” also known as the phosphagen energy system. Once the available ATP is used up, which occurs in a few seconds, a molecule called phosphocreatine is used to re-form ATP in the muscle.

Detailed explanation-5: -Anaerobic Lactic (Glycolytic) Energy System (High to Medium Intensity – Uptempo) The anaerobic lactic (AL) system (also known as fast glycolysis) provides energy for medium to high-intensity bursts of activity that lasts from 10 seconds to a max of approximately 90 seconds.