MUSCULAR SYSTEM Qs

3 types of muscle

Smooth, Cardiac, Skeletal

Name involuntary muscles

Smooth, cardiac

Name type of voluntary muscle

Skeletal

Fixator muscle

A muscle that stabilises a joint or bone so the agonist can produce movement

All or none law

Muscle fibres that receive a sufficient impulse will contract fully or not at all

Motor unit

Collective name for all structures transporting a nerve impulse

Myoglobin

Stores O2 in muscle fibres

Capillaries

Carries O2 to muscles

Mitochondria

Produces aerobic respiration

Slow twitch contractions

Slow

Fast twitch contractions speed

Fast

Fast twitch respiration

Anaerobic

Slow twitch respiration

Aerobic

Large glycogen stores

Fast twitch

Large phosphate stores

Fast twitch

White fibres

Fast twitch as less o2 in blood

Large fibres

Fast twitch larger forces required

Sarcomere

Z line to Z line and contains myosin and actin

Isometric

No movement but muscles are tense

Concentric

Muscle fibres shorten, moving against gravity

Eccentric

Muscle fibres lengthen, moving with gravity

Latimius Dorsi pair

Deltoids (front or rear)

Erector spinae pair

Abdominals

Articulating bone

A bone that meets and moves against another bone at a joint eg femur and tibia

Sagittal plane

Divides body into L and R

Flexion and extension

Sprinting / football kick

Transverse plane

Body is divided into superior and inferior

Rotation

Golf swing

Frontal Plane

Body is divided into posterior and anterior

Abduction and adduction

Side step / star jumps