Muscular System Flashcards
What is the Agonist in an Antagonistic Muscle Action?
The contracting muscle responsible for causing movement
What is the Antagonist in an Antagonistic Muscle Action?
Relaxing and Lengthening muscle which allows movement
What happens in an Isometric Muscle Contraction?
No movement
Length of the muscle does not change
The muscle is actively engaged in holding a static position
What is an Isotonic Concentric Contraction?
Muscle is shortening against a resistance whilst contracting
What is an Isotonic Eccentric Contraction?
Muscle that is contracting is lengthening
Happens after a muscle has shortened against a resistance
Sporting example of an Isotonic Contraction?
Plank, Wall sit
Sporting Example of an Isotonic Concentric Contraction?
Upwards phase of a bicep curl
Sporting Example of an Isotonic Eccentric Contraction
Lowering phase of a bicep curl
What collects signals in a motor unit
Dendrites
What passes signals in a motor unit
Axon
What is ACh?
Assists the nerve impulse across the gap to the muscle fibre
What is the ‘All or None’ law?
Whether the electrical charge reaches a threshold value for the muscle fibre to fully contract, or to not contract at all.
What is M A N S A YS ALL
M - Motor neurone and muscle fibre
A - Action Potential travels down axon
N - Neuromuscular Junction
S - Synaptic Cleft
A - ACh
YS - Secretes the gap to pass signal to the muscle fibre
ALL - All or None Law
What are the 3 types of Muscle Fibre
Slow Oxidative
Fast Oxidative Glycolitic
Fast Glycolytic
Slow Oxidative recovery time?
90 Secs
Fast Glycolitic recovery time?
Can take 4-10 days
Sport where Slow Oxidative muscle fibres will be predominately used
Long Distance Swim
Sport where Fast Oxidative Glycolytic muscle fibres will be predominately used
800m Sprint
Sport where Fast Glycolytic muscle fibres will be predominately used
Shotput
