Muscular Contraction - Motor Units, Transmitters And Fibre Types

Question 1

What are the three muscle fibre types?

Answer 1

Slow oxidative
Fast oxidative glycolytic
Fast glycolytic

Question 2

What are the structural characteristics of a slow oxidative muscle fibre?

Answer 2

Size - small
Colour - red
Glycogen store - low
Capillaries - high
Mitochondria - many

Question 3

What are the structural characteristics of a fast oxidative glycolytic muscle fibre?

Answer 3

Size - intermediate
Colour - pink
Glycogen store - intermediate
Capillaries - intermediate
Mitochondria - some

Question 4

What are the structural characteristics of a fast glycolytic muscle fibre?

Answer 4

Size - large
Colour - white
Glycogen store - high
Capillaries - low
Mitochondria - few

Question 5

What are the functional characteristics of a slow oxidative muscle fibre?

Answer 5

Contractile speed - low
Contractile force - low
Fatigue resistance - high

Question 6

What are the functional characteristics of a fast oxidative glycolytic muscle fibre?

Answer 6

Contractile speed - intermediate
Contractile force - intermediate
Fatigue resistance - intermediate

Question 7

What are the functional characteristics of a fast glycolytic muscle fibre?

Answer 7

Contractile speed - high
Contractile force - high
Fatigue resistance - low

Question 8

What’s an example of a Type 1 athlete?

Answer 8

Marathon runner, road cyclist, triathlon competitor

Question 9

An example of a type 2a athlete?

Answer 9

A games player

Question 10

An example of a type 2b athlete?

Answer 10

Javelin thrower or 100m runner