10. Muscles

The __________ assists the triceps brachii in forearm extension.

__________ are muscles that oppose or reverse a particular movement.

The extensor digitorum muscle is an example of a __________ muscle.

The prime movers of back extension are the __________.

The __________ is the prime mover of dorsiflexion of the foot.

The prime mover of arm extension is the __________.

A muscle that assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts is a(n)a. antagonist,b. prime mover,c. synergist,d. agonist.

Multiple ChoiceMore than one choice may apply.Doing the pincer grasp is an________movement.a. extendingb. abductingc. adductingd. opposing

The hamstring and quadriceps muscle groups are antagonists of each other, and each group is a prime mover in its own right. What action does each muscle group perform?

Name three muscles or muscle groups used as sites for intramuscular injections. Which is most often used in babies?

While jogging, Mr. Ahmadi was forced to jump out of the way of a speeding car. He heard a snapping sound that was immediately followed by pain in his right lower calf. A gap was visible between his swollen calf and his heel, and he was unable to plantar flex that foot. What do you think happened?

Why does a convergent muscle exhibit more versatility when contracting than does a parallel muscle?

Why can a pennate muscle generate more tension than can a parallel muscle of the same size?

Why is it difficult to lift a heavy object when the elbow is at full extension?