3.1.1 Applied anatomy and physiology

Question 1

What are the characteristics of a type I muscle fibre

Answer 1

High resistance to fatigue

High numbers of mitochondria

Question 2

Identify two characteristics of fast twitch glycolytic muscle fibres(type

Answer 2

High glycogen stores

High Phosphate Creatine stores

Question 3

Explain how the characteristics of fast twitch glycolytic muscle fibres(type IIx) are suited to producing ATP anaerobically during powerful contractions

Answer 3

High PC stores - increased energy source for ATP production via the ATP-PC system
High glycogen stores - increased energy source for ATP production

Question 4

Name the muscle fibre type in use during an endurance race and identify the physiological characteristics that allow these muscle fibres to work for an extended period of time.

Answer 4

Type 1
Slow twitch fibres
High number mitochondria
High levels of myoglobin

Question 5

Outline the role of muscle spindles

Answer 5

Prevent over stretching

Detect change in muscle length

Question 6

Outline the role of golgi tendon organs during PNF

Answer 6

Detect tension in the muscle (during isometric contraction phase)
Delays the stretch reflex

Question 7

Outline how the force of muscle contraction can be varied to ensure that skills are executed correctly.

Answer 7

Brain can recruit either slow or fast twitch motor units to ensure all the muscles required for each skill are correctly activated