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