Neuromuscular System

Question 1

Proprioceptive Neuromuscular
Facilitation

Answer 1

An advanced stretching technique used to
increase flexibility

Question 2

Slow oxidative

Answer 2

Slow twitch
Slow contractions
Aerobic activity
e.g. marathon

Question 3

Fast oxidative glycolytic

Answer 3

Fast twitch
Fast contractions
Fatigue relatively quickly
e.g. 800m

Question 4

Fast glycolytic

Answer 4

Fast twitch
Very fast contractions
Fatigue very quickly
e.g. 100m

Question 5

Motor units

Answer 5

consist of a group of one type of muscle fibre and a motor neurone which transmits signals from the brain to the muscle fibres in the
motor unit.

Question 6

All or none law

Answer 6

For a stimulus to result in a muscle contraction, the stimulus strength must be high enough to reach the threshold for ALL muscle fibres within a motor units

Question 7

Wave summation

Answer 7

Where a greater frequency in nerve impulses results in a more powerful contraction.

Question 8

Tetanic contration

Answer 8

a sustained muscle contraction as the impulses are fast enough that they run together and the motor neurone is maximally stimulated.

Question 9

Spatial Summation

Answer 9

multiple motor units are recruited in order to increase the strength of a muscle contraction

Question 10

Type of proprioceptors involved
in PNF.

Answer 10

Muslce spindles and golgi tendon organ

Question 11

Muscle spindles

Answer 11

send a signal to
the medulla
oblongata if a
muscle is
overstretching

Question 12

Golgi-tendon organs

Answer 12

detect tension levels
within a muscle to
see if the muscle
contracts
isometrically

Question 13

Identify the characteristics of fast twitch glycolytic muscle fibres (type IIx)

Answer 13

• Fast motor neurone conduction velocity
• Large muscle fibre diameter
• More sarcoplasmic reticulum development
• High PC stores
• High glycogen stores
• High myosin ATPase/glycolytic enzyme activity