Energy and Muscle Rules

Muscle Rule 1: Muscles must have at least_____________ attachments

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Muscle Rule 1: Muscles must cross at least 1...

• bone

• joint

• suture

• limb

Muscle Rule 2: Muscles always______ to get shorter

• pull

• push

• contract

• lengthen

Muscle Rule 3: The attachment that moves is known as the ...

• insertion

• origin

Muscle Rule 3: The attachment that remains stationary is known as the ...

• insertion

• origin

Muscle Rule 4: Muscles that decrease ventral angles are known as...

• flexors

• extensors

Muscle Rule 4: Muscles that increase ventral angles are known as...

• flexors

• extensors

Muscle Rule 5: Muscles work in opposing...

Muscle Rule 6: Muscle ___________ point to the attachments and show the direction of pull.

Each time a myosin filament engages with an actin filament _______ ATP molecule/s is/are used.

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