neuromuscular system
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29 Terms
Explain the order of events of starlings law
Venous return increases
Greater diastolic filling of the ventricle
Ventricle experiences great strength
Ventricle contracts with great strength
Stroke volume is higher
Ejection fraction is higher
Define vital capacity
Max volume of air you can exhale after max inhale
Name the hormone responsible for increasing hr
Adrenaline
Why does type 1 and 2x muscle fibres help an 100m sprinter
100m is anaerobic and very intense
2x is most helpful as its more anaerobic and fatigue easy
Whats wave summation
Repeated nerve impulse with no time to relax
Produces a forceful sustained contraction called tetanic contraction
Whats spatial summation
Recruitment of more and bigger motor units to develop more force
What’s PNF
An advanced stretching technique to improve flexibility
PNF in practice
Hold the limb until the muscle is stretched and tension is felt, for 30 seconds
Then isometrically contract the stretched muscle by pushing the leg forward against their partner for 10 seconds, partner resists all movement
The limb is pushed past its normal range of movement for 30 seconds. Then 30 seconds recovery before repeating
What are muscle spindles
Sensitive propriorecpetors in muscles
They provide info the CNS about how fast and how far a muscle is being stretched
Whats GTOs
Between muscles and tendon
They detect tension levels
3 characteristics of type 2a fibres
Fast contraction speed
Moderate fatigability
High force produced
Characteristics of 2x fibres
Very high anaerobic capacity
Very fast contraction speed
High force produced
Define IRV
Volume of air that can be forcibly inspired after a normal breath
2 receptors involved in PNF
Muscle spindles
GTOs
Joint type of ankle
Hinge
Joint type of knee
Hinge
Joint type of hip
Ball and socket
Joint type of shoulder
Ball and socket
Joint type of elbow
Hinge
Articulating Bones of ankle
Talus
Tibia
Fibula
Articulating bones of knee
Femur
Tibia
Articulating bones of hip
Pelvis
Femur
Articulating bones of shoulder
Humerus
Scapula
Clavicle
Articulating bones of elbow
Humerus
Ulna
Radius