6.3 Muscle Interactions, Naming, and Arrangements

Multiple Choice

Which statement best describes the action of skeletal muscles in the body?

• Muscles can both push and pull as they contract.

• Muscles can only push as they contract—not pull.

• Muscles can only pull as they contract—not push.

• Muscles neither push nor pull as they contract.

Multiple Choice

Which term describes a muscle that opposes or reverses a prime mover?

• Prime mover

• Antagonist

• Synergist

• Fixator

Fill in the Blank

The latissimus dorsi is the ___ of the pectoralis major.

Multiple Select

Select all correct statements about muscle actions based on their position relative to a joint.

• A muscle crossing the anterior side of a joint produces flexion.

• A muscle crossing the posterior side of a joint produces abduction.

• A muscle crossing the lateral side of a joint produces abduction.

• A muscle crossing the medial side of a joint produces adduction.

Open Ended

Explain how the position of a muscle relative to a joint affects the type of movement produced, using examples from the images.

Multiple Choice

Which example illustrates the naming of a muscle based on the direction of its fibers?

• Maximus

• Rectus

• Teres major

• Deltoid

Open Ended

What criteria are used to name skeletal muscles?

Fill in the Blank

The muscle with three heads is called the ___ .

Multiple Choice

Which of the following is NOT a criterion used in naming skeletal muscles?

• Location of the muscle

• Number of origins

• Shape of the muscle

• Type of nerve supply

Multiple Select

Select all the correct examples of muscles that match their fascicle arrangement:

• Orbicularis oris - Circular

• Pectoralis major - Convergent

• Biceps brachii - Parallel

• Deltoid - Multipennate

Multiple Choice

Which statement best describes the interaction of skeletal muscles in the body?

• Muscles can only pull as they contract, not push.

• Muscles can push and pull as they contract.

• Muscles can only push as they contract, not pull.

• Muscles produce the same action on both sides of a joint.