Muscles

Muscle fatigue is due in part to the accumulation of:

• lactic acid

• ATP

• carbon dioxide

• pyruvic acid

The only energy source that can be used to directly power muscle activity is:

• lactic acid

• oxygen

• ATP

• creatine phosphate

Muscles pull on _______ to help you move.

• Body parts

• Other muscles

• Bones

_________ muscles are controlled by you.

• Involuntary

• Voluntary

__________ muscles you do not control.

• Voluntary

• Involuntary

Arms and legs are _______ muscles.

• Voluntary

• Involuntary

Is this movement voluntary or involuntary ? Pumping blood through your body

• Voluntary

• Involuntary

Your muscular system contains over _______ muscles.

• 200

• 100

• 1,000

• 600

How many types of muscle fibre are there

• 2

• 3

• 4

• 5

What are the characteristics of fast twitch muscle fibres?

• explosive activities, fatigue slowly
• endurance activities, fatigue slowly
• explosive activities, fatigue quickly
• endurance activities, fatigue quickly