10. Muscles

__________ are muscles that oppose or reverse a particular movement.

What is the primary action of the sternocleidomastoid muscle when it contracts unilaterally (one side only)?

What is the primary action of the frontalis muscle?

In muscle actions, which term describes a muscle that opposes or reverses the movement produced by the prime mover (agonist)?

Which muscle is the prime mover for abduction of the arm at the shoulder (glenohumeral) joint?

Which of the following is NOT a member of the hamstrings?

Which muscle action is primarily responsible for shrugging the shoulders?

Which of the following muscles does not act in plantar flexion?

Which muscles are most likely to be overactive when knee valgus occurs during the overhead squat?

Which of the following best describes the action of the palmaris longus muscle?

All muscles cross at least one _____.

What structure attaches muscle to bone?

Which of the following best describes the primary action of the flexor carpi ulnaris muscle?

Which of the following is an action of the teres major muscle?

When does a muscle perform an action, during contraction or relaxation?