anatomy chapter 10

An antagonist is

a muscle working in opposition to another muscle

Supination of the forearm and hand is accomplished by the __________

biceps brachii and supinator

Of the following muscles of the thigh, which one is NOT part of the quadriceps group?

biceps femoris

Which of the following is a posterior thigh muscle?

biceps femoris

Which of the following muscles attaches on the head of the fibula?

biceps femoris

The flexion of the elbow represents a __________ lever system.

class III

The zygomaticus major muscle

contributes to laughing and smiling.

The depressor anguli oris muscle

contributes to pouting.

Raising your arm to shoulder level is accomplished almost entirely by the _________

deltoid

Contracting the trapezius muscle would

extend and laterally flex the neck

Which abdominal wall muscle is the most superficial of the oblique muscles?

external abdominal oblique

Which of the following muscles is found in the lateral compartment of the leg?

fibularis longus

Which of the following correctly lists the arrangement of components found in a third-class lever?

fulcrum--pull--weight

he adductor longus is named for its __________.

function and size

Muscles can be classified based on their shape and fascicle orientation. Which shape has muscle fibers that run the length of the muscle and taper at each end?

fusiform

Which of the following is inserted on the calcaneus by the Achilles tendon?

gastrocnemius

Which of the following muscles is used when walking on your tiptoes?

gastrocnemius

Which of the following represents a class I lever system?

hyperextension of the head

Facial muscles are unusual in that they

insert and sometimes originate on skin and connective tissue

When a skeletal muscle contracts to cause a given movement, the more movable end of attachment of the muscle is called its __________.

insertion

Which of the following is true regarding the levator scapula muscle?

it laterally flexes the neck is the scapula is fixed

n the body's lever systems, the

joint represents fulcrum point

Eversion and plantar flexion is accomplished by muscles in the __________ compartment.

lateral

The infraspinatus __________.

laterally rotates the arm

The arm is attached to the thorax by the __________.

latissimus dorsi and pectoralis major

Which muscle will elevate the scapula?

levator scapulae

Which of the following muscles is involved in chewing gum?

masseter

The type of muscle that functions as a sphincter is __________

orbicular

Closing or puckering the lips is the action of the __________ muscle.

orbicularis oris

The sternocleidomastoid muscle extends from the mastoid process of the temporal bone to the sternum and medial clavicle. When both sternocleidomastoid muscles contract, the head is flexed. The end of the muscle that connects to the sternum is the __________.

origin

The brachioradialis is named for its __________.

origin and insertion

Which of the following muscles of the chest has its insertion on the humerus?

pectoralis major

The type of muscle that can contract with the greatest force is the __________.

pennate

Flexion of the hip is a movement produced by the __________.

psoas major and iliacus

Which of the following is a group of four muscles in the anterior thigh?

quadriceps femoris

Which of the following muscles is named for its location?

quadriceps femoris

The abdominal muscle that has its origin at the pubic crest and symphysis pubis is the _________

rectus abdominis

Contracting the right sternocleidomastoid muscle would

rotate the head toward the left

The muscle that is used to cross the legs is __________.

sartorius

Which muscle dorsiflexes and inverts the foot

tibialus anterior

Which abdominal wall muscle inserts on the xiphoid process and the linea alba?

transverse abdominis

Which of the following muscles is named for its shape?

trapezius