Energy Systems in the Human Body

What triggers the use of the lactic acid system for energy production in the body?

• When the body has an excess of oxygen

• When the body has an excess of phosphocreatine

• When the phosphocreatine stores have run out

• When the body is at rest

What is another name for the lactic acid system?

• Aerobic respiration

• Anaerobic glycolysis

• Oxidative phosphorylation

• Krebs cycle

How does the lactic acid system produce ATP compared to phosphocreatine?

• More slowly

• Equally as quickly

• Not at all

• Quickly, but not as quickly as phosphocreatine

For what duration of high-intensity exercise does the lactic acid system predominantly produce ATP?

• Between 1 to 2 minutes

• Between 30 seconds and three minutes

• Between 5 to 10 minutes

• Between 10 to 15 minutes

What does the aerobic energy system require to function?

• Carbohydrates only

• Oxygen

• Sunlight

• Electricity

When does the body start to use the aerobic energy system?

• Immediately when we start exercising

• After a few minutes of exercising

• Only during high-intensity exercise

• When we are sleeping

Compared to the previous two energy systems discussed, how does the aerobic energy system provide ATP?

• At a faster rate

• At the same rate

• Without using ATP

• At a much slower rate

For what type of activity is the aerobic energy system primarily responsible for producing most of our energy?

• High-intensity exercise like sprinting

• When the body is resting or during low-intensity exercise like jogging

• Only when the body is in a state of stress

• During anaerobic activities

What determines which energy system supplies most of the ATP?

• The time of day

• The type of food we eat

• What we are doing

• The weather conditions

Which energy system provides nearly all our energy at rest?

• Phosphocreatine system

• Lactic acid system

• Aerobic energy system

• Glycolytic system