Muscular system

Question 1

Slow twitch oxidative (type I)

Answer 1

• slow contraction speed
• low force produced
• low tendency to fatigue
• aerobic
• endurance based
• requires oxygen to function

Question 2

Fast twitch oxidative glycolytic (type IIA)

Answer 2

• Fast contraction speed
• medium tendency to fatigue
• speed and strength based
• anaerobic

Question 3

Fast twitch glycolytic (Type IIB)

Answer 3

• fast contraction speed
• high force produced
• high tendency to fatigue
• anaerobic
• speed and strength based

Question 4

Describe a concentric muscle contraction

Answer 4

When the muscle shortens while contracting.
E.g. upward phase of bicep curl.

Question 5

Describe a eccentric muscle contraction

Answer 5

When the muscle lengthens while contracting.
E.g. downward phase of bicep curl

Question 6

Describe a isometric muscle contraction

Answer 6

When the muscle length stays the same while contracting.
E.g. plank hold

Question 7

Describe an action potential

Answer 7

Positive electrical charge inside the nerve and muscle cells which conducts the nerve impulse down the neuron and into the muscle fibre.

Question 8

Describe the all or none law

Answer 8

If a motor unit receives a stimulus and creates an action potential which reaches the muscle fibres and contract OR NOT