neuromuscular system Flashcards
MUSCLE FIBRES
type 1 structural (5)
small motor neurone
small muscle fibres
many mitochondria
high capillary density
high myglobin
MUSCLE FIBRES
type 1 functional (5)
-slow contaction speed
-slow motor neurone contraction capacity
-low force
-very high aerobic capacity
- low fatiuge rate
MUSCLE FIBRES
type 2a structural (4)
-large motor neurone
-medium myoglobin
-medium mitochondria
-midium cappilary densiy
MUSCLE FIBRES
type 2a functional (5)
-fast contraction speed
-high force
-high anaerobic capacity
-fast motor neurone conduction capacity
-medium resistance to fatiuge
MUSCLE FIBRES
type 2x structural (5)
-large motor neurone
-large fibre size
-low capillary density
-low myglobin
-low mitochondria
MUSCLE FIBRES
type 2x functional (5)
-fast contraction speed
-fast motor neurone conduction capacity
- high force
-low resistance to fatiuge
- very high anareobic capacity
NERVOUS SYSTEM
whats the role of the nervous system
transmits signles from brain to body
NERVOUS SYSTEM
whats the order in which the impulses go and the name
brain
spinal chord
motor neurone
muscle
= action potential
NERVOUS SYSTEM
what is present in one motor unit
1 motor neurone
many of the same muscle fibres
NERVOUS SYSTEM
what are three ways to vary strength
- increasing the amounts of motor units
- the type of motor units
- frequency
NERVOUS SYSTEM
whats wave summation
- if a second impulse arrives before one before fully relaxes = stronger contraction
- continues till no time for relaxation leaving highest levels of contraction @ tetanic contraction
NERVOUS SYSTEM
whats spatial summation
- increasing strength = more motor units required
- can be used to delay fatiuge sending action potential to the same units to allow others to rest and recover
