Muscular

Question 1

Describe the nervous stimulation of a motor unit?

Answer 1

• Electrical impulse travels down the axon
• acetychlorine is released and travels across the synaptic cleft
• if the electrical impulse is above the threshold
• then the muscle fibres will all contract
• causing the all or none law

Question 2

How the predominance of each muscle fibre type in performers may impact on their performance

Answer 2

slow twitch - endurance - footballer can last 90 mins without fatigue
Fast oxidative glycolytic - muscular endurance - gymnast can complete strenuous dance routine without tiring p
fast glycolytic twitch - power/strength - high jumper can produce explosive strength allowing him to jump over the bar.