Neuro-Muscluar System

Question 1

What are the three types of muscle fibres

Answer 1

–Slow oxidate (type i)
–Fast oxidate (type iia)
–Fast glycolytic (type iib)

Question 2

Characteristics of type 1 muscle fibres

Answer 2

–Slow contraction speed
–Don’t fatigue as quickly

Used by endurance athletes

Question 3

Characteristics of a fast twitch muscle fibres

Answer 3

–Fast contraction speed
–High force of contraction
–Fatigue faster

Used for short intense bursts mostly anaerobic

Question 4

Example of athlete who has type iia muscle type

Answer 4

1500m runner
More resistant to fatigue, bursts of energy is needed

Question 5

Example of athlete who has type iib muscle type

Answer 5

100m Sprinter
Fatigue quicker used for explosive events

Question 6

What is the effect of training on fibre type

Answer 6

Is genetically determined, but training results in hypertrophy of muscle fibres so there’s greater strength in muscles

Question 7

Define motor unit

Answer 7

A motor neurone and its muscle fibres

Question 8

Motor neurones

Answer 8

Nerve cells which transmit the brain’s instructions as electrical impulses to the muscles

Question 9

Define neuromuscular Junction

Answer 9

Where the motor neurone and the muscle fibres meet