Energy systems

Question 1

what are the 3 energy systems ?

Answer 1

ATP-PC (Phosphocreatin system)

Anaerobic (Glycolic / lactic acid system)

Aerobic system

Question 2

ATP-PC attributes

Answer 2

Movements last up to 5-15 secs

Strength power movements

Quick burst movement

Uses ATP stored in the muscles.

Question 3

What energy source do muscles need in order to contract?

Answer 3

ATP (Adenosine triphosphate)

Question 4

When is ATP-PC (Phosphocreatin system)used?

Answer 4

Main energy source for Movements lasting 5-15 sec •Strength power movements
•Quick burst movement
•Uses ATP stored in the muscles ( 4-6 secs)

Phosphocreatin - works with ATP to lengthen the energy duration

Question 5

Anaerobic (Glycolytic) system how does this work?

Answer 5

Break down of carbohydrates
•Glycogen broken down to glucose
•Lactate and Hydrogen ions •Movement at max effort for 1-2 mins (high intensity exercise)
Produces 2 ATP during one cycle of glycolysis

Question 6

Aerobic system how does this work?

Answer 6

LOW-MODERATE Intensity, long duration.

If there is sufficient oxygen available three foodstuffs can be broken down to release energy to resynthesize ATP:
•Carbohydrate or glucose = 38 ATP
•Fats or fatty acids = 147 ATP
•Protein or amino acids = 16 ATP
•Which produced the most molecules of ATP?

Question 7

Aerobic system - Glucose

Answer 7

One molecule of glucose is broken down aerobically by:•Glycolysis•Krebs cycle•Electron transport chain•Produces 38 ATP

Question 8

What is the krebs cycle

Answer 8

A series of chemical reactions used by all aerobic organisms to generate energy. Energy is generated through the oxidation of Acetate

Question 9

What is the electron transport chain/system?

Answer 9

Part of the aerobic respiration system.

The last component of the aerobic respiration; the only part that the glucose uses the oxygen cycle (metabolises)

Question 10

Aerobic system – Fatty acids

Answer 10

Fatty acids are broken down by beta-oxidization to acetyl CoA
• This enters the Krebs cycle and ETC as
for glucose
• Net energy production is approx. 147 ATP

Question 11

Aerobic system – Amino acids (protiens)

Answer 11

• When amino acids are used (from
proteins) they are broken down by
deamination to acetyle CoA
• This enters the Krebs cycle and ETC as
for glucose
• Net energy production is approximately 16
ATP

Question 12

When is the aerobic system used?

Answer 12

Predominated during low and moderate
intensity, long duration exercise.

Releases much higher amounts of energy,
but at a slower rate