The Neuromuscular And Neuroskeletal System

Question 1

What are the characteristics of type 1 muscle fibres?

Answer 1

• Slow oxidative
• Useful for long distances
• High numbers of mitochondria
• High myoglobin levels
• High capillary density
• Slow to fatigue

Question 2

What are the characteristics of type 2a muscle fibres?

Answer 2

• Fast Oxidative Glycolytic muscle fibres
• Middle distance
• Quick to fatigue
• High force levels
• speed endurance events

Question 3

What are the characteristics of type 2x muscle fibres?

Answer 3

• Fast Glycolytic fast
• explosive movements
• very fast speeds of contraction
• very high force production
• very quick to fatigue

Question 4

What is the all-or-none law?

Answer 4

When a motor unit receives a stimulus of sufficient intensity to bring forth a response, all the muscle fibres within the unit will contract at the same time, and to the maximum possible extent.

Question 5

What is wave summation?

Answer 5

More impulses sent from neurones to the muscles to create more tension

Question 6

What is Spatial Summation?

Answer 6

The change in contraction strength due to change in number/size of motor units

Question 7

What is tetanic contraction?

Answer 7

A sustained muscle contraction caused by a series of fast repeating stimuli with no rest period. It is a maximal effort

Question 8

What is a motor unit made up of?

Answer 8

• Motor neurone
• Axon terminal
• Muscle fibres

Question 9

What is the CRAC technique?

Answer 9

Contract
Relax
Antagonist
Contract

Question 10

What is autogenic inhibition?

Answer 10

Where there is sudden relaxation in high response to tension