Diagram of Unit 2 - Functional Anatomy | Quizlet

Contractibility

The ability of a muscle to shorten

TERM

Extendibility

DEFINITION

The ability of a muscle to lengthen

Elastic

A characteristic of muscle that allows it to return to its original length

Excitable

A characteristic of muscle that allows it to be controlled by nerve impulses

Fast twitch muscle fibres

Also known as white or type II fibres

Slow twitch muscle fibres

Also known as red of type I fibres

Endurance athletes

Have a larger percentage of slow twitch muscle fibres

Sprint athletes

Have a larger percentage of fast twitch muscle fibres

Power athletes

Have a larger percentage of slow twitch muscle fibres

Flexion

When the angle of a joint decreases

Extension

When the angle of two bones at a joint increases

Circumduction

Moving a bone so that the end makes a circle

Adduction

The movement of a bone towards the centre line of the body

TERM

Abduction

DEFINITION

The movement of a bone away from the centre line of the body

Origin of muscle

The point at which the muscle joins the stationary bone

Insertion of muscle

The point at which the muscle joins the moving bone

Abdominal muscles

The antagonist muscle in trunk extension

Quadricep

The agonist muscle in knee extension

Hamstring

The antagonist muscle in knee extension

Bicep

The agonist in the upward movement of a bicep curl

Tricep

The antagonist in the downward movement of a tricep dip

Tibialis anterior

The antagonist involved in plantar flexion

Gastrocnemius

The agonist muscle involved in plantar flexion

Deltoid

The antagonist muscle involved in adduction of the arm at the shoulder

Plantar flexion

Moving the top of the foot away from the tibia

Dorsi flexion

Moving the top of the foot towards the tibia

Pronation

Moving the bones of the forearm so that the palm faces downward

Supination

Moving the bones of the forearm so that the palm faces upward

Rotation

Moving a bone around its own longitudinal axis