Energy Systems

What is the primary function of the creatine phosphate (CP) system?

• To fuel low-intensity activities

• To regenerate glycogen stores

• To primarily fuel high-intensity, explosive activities

• To provide oxygen to muscles

Answer explanation

The creatine phosphate (CP) system primarily fuels high-intensity, explosive activities by rapidly regenerating ATP, which is essential for short bursts of energy during intense exercise.

How long does the CP system typically last before exhaustion?

• 5 seconds

• 10 seconds

• 30 seconds

• 1 minute

Answer explanation

The CP system typically lasts for about 10 seconds before exhaustion, making it the correct choice among the options provided.

What is the lactate system primarily used for?

• Low-intensity exercise

• High-intensity exercise lasting longer than 10 seconds

• Resting energy supply

• Oxygen transport

Answer explanation

The lactate system is primarily used for high-intensity exercise lasting longer than 10 seconds, as it provides energy quickly when oxygen levels are insufficient for aerobic metabolism.

What is the primary function of the aerobic system?

• Produce ATP with oxygen

• Store glycogen

• Release lactic acid

• Break down proteins

Answer explanation

The primary function of the aerobic system is to produce ATP using oxygen. This process is essential for sustained energy during prolonged physical activity, unlike the other options which do not directly relate to the aerobic system.

Tags

NGSS.HS-LS1-7

Which macronutrients are primarily used in the aerobic system to produce ATP?

• Proteins and vitamins

• Fatty acids and carbohydrates

• Minerals and water

• Amino acids and glucose

Answer explanation

The aerobic system primarily uses fatty acids and carbohydrates to produce ATP. These macronutrients are oxidized in the presence of oxygen, making them essential for energy production during prolonged, moderate-intensity exercise.

Tags

NGSS.HS-LS1-7

Which energy system is predominantly used during a long-distance marathon?

• CP system

• Lactate system

• Aerobic system

• Anaerobic system

Answer explanation

The aerobic system is primarily used during long-distance marathons as it efficiently produces energy through oxygen, supporting sustained activity over extended periods, unlike the other systems which are more suited for shorter, high-intensity efforts.

Tags

NGSS.HS-LS2-3

Which energy system has the slowest speed of energy production?

• CP system

• Lactate system

• Aerobic system

• All have the same speed

Answer explanation

The aerobic system has the slowest speed of energy production compared to the CP and lactate systems, which provide energy more rapidly for short bursts of activity.

Which energy system produces lactic acid as a by-product?

• CP system

• Lactate system

• Aerobic system

• None of the above

Answer explanation

The lactate system, also known as the anaerobic glycolysis system, produces lactic acid as a by-product when glucose is broken down for energy without sufficient oxygen. This distinguishes it from the CP and aerobic systems.

Tags

NGSS.HS-LS2-3

Which energy system requires time to eat and drink for recovery?

• CP system

• Lactate system

• Aerobic system

• None of the above

Answer explanation

The aerobic system requires time for recovery as it relies on oxygen to produce energy, which can take longer to replenish after prolonged activity. In contrast, the CP and lactate systems provide quicker bursts of energy.

What is the predominant fibre type for the aerobic system?

• Type IIb

• Type IIa

• Type I

• Type III

Answer explanation

Type I fibers are the predominant fiber type for the aerobic system, as they are slow-twitch fibers that are highly efficient at using oxygen for sustained energy during prolonged activities.