Chap 2 - Muscle Fibers

Question 1

Characteristics of Type 1 slow twitch muscle fibres

Answer 1

Mitochondria density: Very High
Colour: Red
Myoglobin: High
Contraction speed: Slow
Capillary density: High
Endurance: Long

Question 2

Characteristics of Type 2A fast twitch muscle fibres

Answer 2

Mitochondria density: High
Colour: Red
Capillary density: Medium
Myoglobin: Medium
Contraction speed: Fast
Endurance: Intermediate

Question 3

Characteristics of Type 2B fast twitch muscle fibres

Answer 3

Colour: White
Contraction speed: Fast
Capillary density: Low
Myosin: Low
Endurance: Short