Energy Systems in Human Physiology

Front

Energy sources include stored adenosine triphosphate (ATP), phosphocreatine, blood glucose, glycogen, and fatty acids.

Back

Various sources of energy utilized by the body during physical activity.

Front

ATP-PC system

Back

A short-term energy system that uses adenosine triphosphate and phosphocreatine.

Front

Lactate System (Glycolysis)

Back

An energy system that breaks down glucose for energy without the need for oxygen.

Front

The aerobic system involves aerobic glycolysis, the Krebs cycle, the electron transport chain, and the role of mitochondria.

Back

A long-term energy system that relies on oxygen to produce energy.

Front

ATP yield for each energy system

Back

Different energy systems produce varying amounts of ATP.

Front

Energy System Continuum

Back

A model that describes the interplay between different energy systems during physical activity.

Front

Onset of Blood Lactate Accumulation (OBLA)

Back

The point during exercise at which lactate starts to accumulate in the blood.

Front

Recovery Time for Each Energy System

Back

The duration required for each energy system to recover after exertion.

Front

Sources of energy for muscles

Back

Adenosine triphosphate (ATP), phosphocreatine, blood glucose, glycogen, fatty acids

Front

Energy systems using muscle energy sources

Back

ATP-PC, Lactate, Aerobic