Chapter 10: Anatomy Of Muscular System

Front 1

First-class lever

Back 1

When the fulcrum lies between the pull and the load; not abundant in human body

Front 2

Second-class lever

Back 2

Load lies between the fulcrum and the joint at which the pull is exerted; presence of this type in human body is controversial

Front 3

Third-class lever

Back 3

Pull is exerted between the fulcrum and load; most abundant in human body

Front 4

Origin

Back 4

Point of attachment that does not move when the muscle contracts

Front 5

Insertion

Back 5

Point of attachment that moves when the muscle contracts

Front 6

Prime mover

Back 6

A muscle that directly performs a specific movement

Front 7

Agonists

Back 7

Any "mover" muscle that directly performs a movement, including the prime mover

Front 8

Antagonists

Back 8

Muscles that, when contracting, directly oppose prime movers; relax while prime mover is contracting to produce a more controlled movement

Front 9

Synergists

Back 9

Muscles that contract at the same time as prime movers; facilitate prime mover actions to produce a more efficient movement

Front 10

Fixator muscles

Back 10

Joint stabalizers (type of synergists)

Front 11

Good posture

Back 11

Body alignment that most favors function; achieved by keeping the body's center of gravity over it's base, requires the least muscular work to maintain