Muscular System - Muscle ID & Actions

Match each muscle type to its correct description.

• mustcle that opposes or reverses a prime mover.

• Prime mover

• muscle with the major responsibility for a certain movement.

• Antagonist

• muscle that aids a prime mover in a movement and helps prevent rotation.

• Fixator

• stabilizes the original of a prime mover.

• Synergist

Which of the following is a muscle named due to the direction of its muscle fibers?

• rectus abdominus

• masseter

• tibialis anterior

• gastrocnemius

• biceps brachii

Which of the following is a muscle named due to relative size?

• gluteus medius

• tibialis anterior

• buccinator

• triceps brachii

• soleus

Which of the following is a muscle NOT named due to its location?

• platysma

• sternocleidomastoid

• temporalis

• tibialis anterior

• rectus femoris

Which of the following is a muscle named due to its number of origins?

• biceps brachii

• semimembranosus

• internal obliques

• frontalis

• brachioradialis

Which of the following is a muscle NOT named due to its shape?

• gastrocnemius

• trapezius

• serratus anterior

• deltoid

• brachioradialis

Which of the following is NOT a muscle named due to its action?

• extensor digitorum

• levator scapulae

• flexor carpi radialis

• occipitalis

• abductor magnus

True/False: With a few exceptions, all skeletal muscles cross at least two joints.

• True

• False; one joint

• False; three joints

• False; four joints

True/False: Typically, the bulk of a skeletal muscle lies proximal to the joint crossed.

• True

• False; distal

• False; intermediate

• False; superior

• False; medial

All skeletal muscles have at least two attachments: __________.

• myosin & actin

• tendon & bone

• origin & insertion

• joint & origin

• joint & fixator