Muscle fibres

Question 1

What is Type 1 muscle fibre

Answer 1

Slow Oxidative

Slow Twitch

Question 2

What is Type 2a muscle fibre

Answer 2

Fast oxidative glycolic

Fast twitch with slow twitch characteristic

Question 3

What is type 2b muscle fibre

Answer 3

Glycolyctic fast twitch

Question 4

Characteristic of type 1 muscle fibre

Answer 4

Small motor neurone
High mitochondria density
High myoglobin content
High capillary density
Low Myosin ATPase/glycolytic enzyme activity

Question 5

Function of Type 1 muscle fibre

Answer 5

Slow contraction speed
Slow motor neuron conduction capacity
Low force production
Low fatiguability
Very high aerobic capacity
Low anaerobic capacity

Question 6

Characteristics of Type 2a muscle fibre

Answer 6

Big motor neurone size
Medium mitochondria density
Medium myoglobin content
Medium capillary density
High glycolyctic enzyme activity/ Myosin ATPase

Question 7

Function of type 2a muscle fibre

Answer 7

Fast contraction speed
Fast neuron conduction
High force
Medium fatiguability
Medium aerobic capacity
High anaerobic capacity

Question 8

Characteristics of type 2b muscle fibre

Answer 8

Big motor neuron size
Low mitochondrial density
Low myoglobin content
Low capillary density
Very High Myosin ATPase/ glycolytic enzyme activity

Question 9

Function of type 2b muscle fibre

Answer 9

Fast contraction
Fast motor neuron conduction speed
High force
High fatiguability
Low aerobic capacity
Very High anaerobic capacity

Question 10

Can you change the muscle fibre in a motor Unit

Answer 10

No, you can train a fast twitch to gain slow twitch characteristics but cannot change the type