Neuromuscular

Question 1

Nervous system functions

Answer 1

Sensory- detect changes in the body and environment
Association- to interpret the sensory changes
Motor- to respond to the changes with movement or chemical release

Question 2

Slow twitch oxidative fibres

Answer 2

Aerobic athletes
Lots of capillaries
Red fibres
High myoglobin
High mitochondria
Small fibres and motor neurones
Small force
Slow contractions
Low fatigue

Question 3

Fast twitch glycolytic fibres

Answer 3

Anaerobic athletes
White fibres
Large fibres and motor neurone
Fast,powerful contractions
Fatigue easily
Large pc stores
Large glycogen stores
High anaerobic enzyme activity

Question 4

Fast twitch oxidative glycolytic fibres

Answer 4

Games players
Aerobic qualities to keep going for the whole game
Anaerobic qualities to be able to sprint, jump, tackle etc
Can be trained to have more anaerobic or more aerobic qualities depending on what’s required

Question 5

What is the neuromuscular junction

Answer 5

Where the motor neurone meets the muscle fibre

Question 6

What is a motor unit

Answer 6

Consists of a motor neuron and all the muscle fibres it innervates
Motor units too small= more control
Motor units too large= more power

Question 7

What’s the all or none law

Answer 7

All fibres that receive an impulse will contract fully or not at all

Question 8

Spatial and multiple summation

Answer 8

More motor units recruited= more force generated by the whole muscle
Bigger motor units recruited= more force generated by the whole muscle
So contraction changes by altering number and size of motor units recruited