Energy Systems

Phosphocreatine System

Phosphocreatine broken down into creatine through the enzyme creatine kinase releasing an inorganic phosphate and energy which can be used to resynthesise ADP into ATP

What is the primary fuel source for the Phosphocreatine (PC) System?

Phosphocreatine located in the skeletal muscles.

How long can the Phosphocreatine (PC) System supply energy?

Up to 10 seconds.

What intensity is associated with the Phosphocreatine (PC) System?

Maximum intensity, e.g., 100m sprint.

Where is phosphocreatine found in the body?

In the sarcoplasm of skeletal muscles.

What is another name for the Phosphocreatine (PC) System?

Alactic System.

What activates the Phosphocreatine (PC) System?

An increase in ADP.

Is the Phosphocreatine (PC) System anaerobic or aerobic?

Anaerobic.

How many ATP molecules does the Phosphocreatine (PC) System produce?

1 ATP molecule.

What is the energy stores in the PC system?

Limited

What are the by-products of the Phosphocreatine (PC) System?

No by-products.

Lactic Acid System

Glycogen is broken down into glucose through phosphofructokinase, if oxygen is present pyruvate is produced, if oxygen isn't present lactic acid is produced both releasing energy to produce ATP

What fuel source does the Lactic Acid System primarily use?

Glucose.

What is the duration of energy supplied by the Lactic Acid System?

Up to 75 seconds.

What intensity level is associated with the Lactic Acid System?

Medium intensity, e.g., 400m race.

What is another name for the Lactic Acid System?

Anaerobic glycolysis.

What activates the Lactic Acid System?

A decrease in PC levels.

Does the Lactic Acid System operate anaerobically or aerobically?

It can operate anaerobically/aerobically.

How many ATP molecules does the Lactic Acid System produce?

2 ATP molecules.

What are the energy stores in the lactic acid system?

Adequate

What is a by-product of the Lactic Acid System?

Lactic acid.

Aerobic System

1. Aerobic Glycolysis

2. Kreb Cycle

3. Electron Transport Chain

What is glucose broken down into during aerobic glycolysis?

pyruvic acid (oxygen is available so lactic acid isn’t produced)

Where does pryuvic acid move to during the kreb cycle?

mitochondria and mixes with the coenzyme A to create acetyl coenzyme

—> acetyl coenzyme is broken down to produce 2 ATP molecules, carbon dioxide and electron carriers for further energy production

What happens to the hydrogen atoms?

They are removed to transport electrons to the electron transport chain

What do the hydrogen atoms combine with in the electron transport chain?

Oxygen in the mitochondria to make water.

What is the fuel for the aerobic system?

Glucose, lipids and protein

What is the duration of energy supplied by the Aerobic System?

75 seconds plus.

What is the intensity level associated with the Aerobic System?

High intensity, e.g., marathon.

How long does it take for the Aerobic System to kick in?

Approximately 30 seconds.

What does the aerobic system supply hours of?

energy

What does the aerobic system supply?

oxygen to the muscles

What are the by-products of the Aerobic System?

Carbon dioxide and water.