Ch. 11 - Muscular System

Which of the following flex the forearm at the elbow?

A and B are correct (brachialis, brachioradialis )

Which of the following penetrates the diaphragm?

A and B are correct (esophagus, inferior vena cava)

Fascicle arrangements

A, B and C are correct (are named based on their orientation with the tendon of the muscle, affect the power of muscles, affect the range of motion of muscles)

Which of the following flex the wrist?

A, B and C are correct (flexor carpi ulnaris, flexor carpi radialis, flexor digitorum superficialis)

Muscles of facial expression

A, B and C are correct (generally originate from bones of the facial skull, generally insert on the skin, are innervated by the facial (VII) nerve)

Lower limb muscles function in

A, B and C are correct (maintaining stability, maintaining posture, moving the body)

Which of the following muscles extends the head on the neck?

A, B and C are correct (splenius capitis, semispinalis capitis, longissimus capitis)

Which of the following is true?

All of the above are correct (The end of the muscle attached to the bone that moves most is the insertion of the muscle, Muscles pull on bones; they do not push bones, The main movement that occurs when the muscle contracts is the action of the muscle, The end of the muscle attached to the bone that moves least is the origin of that muscle)

Which of the following may be the basis for the name of a muscle

All of the above may be used to name a muscle (the direction of the muscle's fasicles, the location of the muscle, the action of the muscle, the size of the muscle)

Intrinsic muscles of the foot

All of these are correct (include four layers of plantar muscles, are specialized for support and locomotion, include only one dorsal group muscle, the extensor digitorum brevis, have origins and insertions within the foot)

Which of the following is true?

The origin of a muscle on a limb is usually proximal to its insertion.

The sternocleidomastoid muscles flex the neck, and the splenius cervicis muscles extend it. What is the relationship between these muscles when bowing your head?

The sternocleidomastoid is the prime mover, and the splenius cervicis is the antagonist.

Which is NOT true of the muscles of the perineum?

They are found in a single layer.

Which of the following muscles is NOT part of the quadriceps femoris?

biceps femoris

Which motions are NOT observed for the scapula?

flexion and extension

Which of the following is NOT a muscle of the abdominal wall?

intercostal muscle

The erector spinae

is involved in extension and flexion of the back

A lever with a mechanical advantage

is when a load is close to the fulcrum and the effort is applied far away

Each of the following is a posterior muscle that moves the pectoral girdle EXCEPT the

serratus anterior

The muscle that serves as a landmark for dividing the neck into anterior and posterior triangles is the

sternocleidomastoid

Which of the following is NOT considered an anterior neck muscle?

sternocleidomastoid

Which of the following muscles divide the neck region into the anterior triangle?

sterocleidomastoid

All of the following contribute to the rotator cuff EXCEPT the

teres major

Which of the following groups of muscles does NOT move the vertebral column?

the rhomboid group

Each of the following is true of extrinsic muscles of the tongue EXCEPT that

they alter the shape of the tongue rather than moving the entire tongue