Neuromuscular Function Flashcards
1
Q
List the parts of a motor unit
A
- Cell body (Soma)
- Nucleus
- Dendrite
- Axon
- Schwann cell
- Node of Ranvier
- Myelin Sheath
- Motor end plate
2
Q
Describe the characteristics of type 1 muscles
A
- maintain posture
- fatigue resistant
- slow nerve transmitting
- small force production
- slow oxidative
3
Q
Describe the characteristics of type 2a muscles
A
- leg muscles
- fatigue resistant
- fast nerve transmission
- large force production
- fast twitch oxidative
4
Q
Describe the characteristics of type 2b muscles
A
- ball throwing, weight lifting, arms
- fastest nerve transmittion
- largest force production
- fatigue quickly
- glycolitic
5
Q
What are the implications of motor unit types?
A
- muscles fiber percentages are hereditary
- conditioning cannot change ratio
- muscle biopsies can show muscle composition
