anatomy chapter 10

Most skeletal muscles of the body act in ________.

3rd class lever systems

Choose the FALSE statement.

The hamstrings are prime movers of hip (thigh) flexion and knee (leg) flexion

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

The muscle has two, three, or four origins, respectively

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

a synergist

Part complete Which functional group has the major responsibility for producing a specific movement?

agonists

What is a muscle that provides the major force for producing a specific movement called?

an agonist

The hamstrings consist of three muscles located on the posterior thigh. Why is it recommended that a caregiver squat using these muscles to help a patient sit down?

because it prevents back muscle strain

Which of the following is a hamstring muscle?

biceps femoris

The primary function of the deep muscles of the thorax is to promote ________.

breathing

The ________ muscles compress the cheeks to help keep food between the grinding surfaces of the teeth while chewing.

buccinator

Part complete Which of the following is CORRECTLY matched?

convergent arrangement of fascicles: fan shaped muscle

Part complete Which of the following muscles is innervated by the phrenic nerve?

diaphragm

Paralysis of which of the following muscles would make an individual unable to flex the knee?

hamstring muscles

Paralysis of which of the following would make an individual unable to flex the thigh?

iliopsoas and rectus femoris

Which muscles is (are) contracted to exhale forcibly?

internal intercostals and rectus abdominus

Part complete Which of the following muscles is named for its origin and insertion?

sternocleidomastoid

The major head flexor muscles are the ________.

sternocleidomastoid muscles

The muscle that subdivides the ventral body cavity into the thoracic and abdominopelvic cavities is the ________.

the diaphragm

What is the major factor controlling how levers work?

the difference in the positioning of the effort, load, and fulcrum

Which of the following muscles is involved in producing horizontal wrinkles in the forehead?

the frontal belly of the epicranius

Which of the following muscles inserts by the calcaneal tendon?

the gastrocnemius

The supraspinatus is named for its location on the posterior aspect of the scapula above the spine. What is its action?

to stabilize the shoulder joint and help prevent downward location of the humerus and to assist in abduction

Part A Part complete The main forearm extensor is the ________.

triceps brachii

Muscles that help maintain upright posture are fixators.

true

Which of the following is NOT used as a criterion for naming muscles?

whether the muscle is controlled by the involuntary or voluntary nervous system

Why is the body position of both a post-surgical patient and the caregiver critical in performing a safe patient move from bed to chair?

so that lifting leverage can be properly applied