Bioenergetics in Kinesiology

Flashcards covering key terminology and concepts related to bioenergetics and energy systems introduced in the kinesiology lecture.

Bioenergetics

Flow of energy in a biological system.

Catabolism

Breakdown of large molecules into smaller products yielding energy release.

Anabolism

Formation of large molecules from small substrates requiring energy.

Anaerobic

Processes which do not require the presence of oxygen.

Aerobic

Processes which depend on oxygen.

ATP (Adenosine Triphosphate)

The only compound that the body can use for energy-driven processes.

Phosphagen System

Formation of ATP with creatine phosphate without oxygen for high intensity exercise lasting 8-10 seconds.

Glycolysis

The breakdown of carbohydrates to resynthesize ATP; occurs without oxygen.

Oxidative System

Formation of ATP from the breakdown of fatty acids using oxygen; supports low intensity exercise lasting 2 minutes or longer.

Lactate Dehydrogenase (LDH)

An enzyme that catalyzes the formation of lactate from pyruvate.

Lactate Threshold (LT)

The exercise intensity at which blood lactate begins an abrupt increase above baseline.

Cori Cycle

The shuttling of lactate to the liver whereby lactate is oxidized to form glucose.

Enzyme Activity

The effectiveness of enzymes, which is decreased by high levels of hydrogen ions (H+).

Onset of Blood Lactate Accumulation (OBLA)

The point at which blood lactate concentration reaches 4 mmol/L.