Muscular System

What is origin ?

Where a muscle attaches to a stable bone

What is insertion ?

Where a muscle attaches to a moving bone

What is an agonist ?

The muscle under tension causing a movement

What is an antagonist ?

The muscle that relaxes to coordinate movement

What is a fixator ?

A muscle that stabiles the joint during movement

What is a concentric contraction ?

Isotonic contraction where the muscle gets shorter under tension

What an eccentric contraction ?

Isotonic contraction where the muscle lengths under tension

What is an isometric contraction ?

A contraction where the muscle is under tension with no movement

What is the movement analysis of the elbow ?

Joint type

What is the antagonist and agonist for the elbow in flexion ?

Agonist

Example for extension in the elbow

Downward phase of a bicep curl

What is the movement analysis of the wrist ?

Joint type

What is the agonist and antagonist muscle during Flexion at the wrist ?

Agonist

Example of extension at the wrist

Preparing for a shot in basketball

What is the movement analysis of the knee ?

Joint type

What is the agonist and antagonist muscle of the knee during flexion ?

Agonist

Example of extension at the knee

The execution of kicking a ball in football

What is the movement analysis of the ankle ?

Joint type

What is the agonist and antagonist muscle of the ankle during plantar flexion ?

Agonist

Example of plantar flexion

Upward phase of a calf raise

What is the movement analysis of the shoulder ?

Joint type

What is the agonist and antagonist muscles of flexion at the shoulder ?

Agonist

What is the agonist and antagonist muscle of the shoulder during adduction ?

Agonist

what is the agonist and antagonist muscle of the shoulder during medial rotation ?

Agonist

what is the agonist and antagonist muscle of the shoulder during horizontal flexion ?

Agonist

what is the movement analysis of the hip ?

joint type

What is the agonist and antagonist muscles of flexion at the hip ?

Agonist

What is the agonist and antagonist muscle of the hip during adduction ?

Agonist

what is the agonist and antagonist muscle of the hip during medial rotation ?

Agonist

what is the motor neuron ?

a nerve cell which conducts a nerve impulse to a group of muscle fibres

what is a motor unit ?

a motor neuron and a muscle fibres stimulated by its axon

what is action potential ?

a positive electrical charge that travels down the axon conduction the nerve impulse from the CNS to the muscle

what is the neuro

muscular junction ?

what is acetylcholine ?

the neurotransmitter

what is the all or none law ?

enough neurotransmitter is released and reaches the threshold the muscle will contract if not the muscle wont contract

what does the M stand for in 'Man says all' ?

motor neurons send impulses from the CNS to the muscle fibres

what does the first A stand for in 'Man says all' ?

action potential is carried down the axon

what does the N stand for in 'Man says all' ?

neuro

what does the first S stand for in 'Man says all' ?

synaptic cleft is the gap between the axon and muscle fibres

what does the A stand for in 'Man says all' ?

acetylcholine is a neurotransmitter

what does the S stand for in 'Man says all' ?

secreted the synaptic cleft and allows the action potential to cross the muscle fibre

what does the ALL stand for in 'Man says all' ?

the all or nothing law

what is slow oxidative muscle fibres ?

muscle fibres that store oxygen in myoglobin and process oxygen in the mitochondria allowing them to work aerobically

What are fast glycolytic muscle fibers?

muscle fibres that work anaerobically with large stores of phosphocreatine for rapid energy production