Exam 10: The Muscular System

The__________ tightens the neck and draws the corners of the mouth downward as in expressing horror.

Both first- and second-class levers operate at a mechanical disadvantage.

When the term biceps, triceps, or quadriceps forms part of a muscle's name, what does it tell you about the muscle?

Bodybuilders are known for their "great quads." Describe the quadriceps muscles.

Which type of lever is exemplified by the flexing of the forearm by the biceps brachii muscle?

Muscle spasms of the back often are due to the erector spinae contraction.

A patient has a stroke and has weakness on his right side. How will the weakness affect his ability to swallow?

The deltoid is a prime mover of the arm that acts in adduction.

The__________ is known as the "boxer's muscle."

A nursing infant develops a powerful sucking muscle that inserts to the muscle which adults also use for whistling (orbicularis oris). What is this muscle called?

If L = load, F = fulcrum, and E = effort, what type of lever system is described as LEF?

The buccinator muscle compresses the cheek and is well developed in nursing infants.

What type of muscle assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts?

Which of the following is NOT a muscle primarily involved in the breathing process?

The__________ extends the great toe.

The most powerful muscle in the body is the __________ .

Most superficial thorax muscles are extrinsic shoulder muscles.

A muscle that opposes, or reverses, a particular movement is a(n)__________ .

Which of the following muscles is involved in crossing one leg over the other to produce the cross-legged position?

Tom has been told that he has an inguinal hernia. What is an inguinal hernia and what is its possible cause?