Understanding Skeletal Muscle Interactions

What is the primary function of a prime mover muscle in the body?

• To stabilize the origin of a muscle

• To oppose the action of another muscle

• To aid another muscle in movement

• To have the major responsibility for a certain movement

Which of the following is an example of a muscle named based on the direction of its fibers?

• Deltoid

• Rectus

• Triceps

• Temporalis

Identify the muscle type that acts to oppose or reverse the action of a prime mover.

• Synergist

• Fixator

• Antagonist

• Prime mover

Which pattern of fascicle arrangement is characterized by fascicles running parallel to the long axis of the muscle?

• Circular

• Convergent

• Parallel

• Pennate

How does a synergist muscle assist in movement?

• By opposing the prime mover

• By stabilizing the origin of the prime mover

• By aiding the prime mover or reducing undesirable movements

• By being the major muscle responsible for the movement

Which of the following criteria is used to name the muscle "triceps"?

• Shape of the muscle

• Number of origins

• Location of the muscle

• Action of the muscle

What is the role of a fixator muscle in the body?

• To oppose the action of a prime mover

• To hold a bone still or stabilize the origin of a prime mover

• To aid a prime mover in a movement

• To be the major muscle responsible for a movement

Which muscle naming criterion is used for the "deltoid" muscle?

• Direction of muscle fibers

• Relative size of the muscle

• Shape of the muscle

• Action of the muscle

What is the characteristic feature of a pennate fascicle arrangement?

• Fascicles are in concentric rings

• Fascicles converge on a single insertion tendon

• Short fascicles attach obliquely to a central tendon

• Fascicles run parallel to the long axis of the muscle

Which of the following is an example of a muscle named based on its action?

• Maximus

• Flexor

• Temporalis

• Sterno