question

If you are prying a piece of wood off of someones leg what lever are you using?

answer

Second-class

question

humorous/ulna joint is which lever?

answer

third-class

question

tibia/calcaneus joint is which lever?

answer

second-class

question

action of lifting a shovel of snow is which lever?

answer

first-class

question

muscle that opposes and reverses the action of another muscle

answer

antagonist

question

muscle that stabilizes the origin of another muscle

answer

Fixator

question

muscle that is primarily responsible for bringing about a particular movement

answer

agonist

question

muscle that aids another by promoting the same movement

answer

synergist

question

flexes the wrist

answer

flexor carpi ulnaris

question

slow-acting finger flexor

answer

flexor digitorum profundus

question

powerful wrist flexors that also stabilize the wrist during finger extension

answer

flexor carpi ulnaris

question

extends and abducts the wrist

answer

extensor carpi radialis longus and brevis

question

extends the thumb

answer

extensor pollicis longus and brevis

question

a pair of tweezers is a good example of a third-class lever

answer

TRUE

question

although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same

answer

FALSE (different)

question

muscles are only able to pull, they never push

answer

TRUE

question

regardless of the type, all levers follow the same basic principle: effort farther than load from fulcrum = mechanical advantage; effort nearer than load to fulcrum = mechanical disadvantage

answer

TRUE

question

movements of the thigh are accomplished by muscles anchored to the pelvic girdle

answer

TRUE

question

the soleus is a synergist of the gastrocnemius during plantar flexion

answer

TRUE

question

muscles that help to maintain posture are often called synergists

answer

FALSE (fixators)

question

in order to propel food down to the esophagus, the pharyngeal constrictor muscles are used.

answer

TRUE

question

plantar flexion at the ankle joint is accomplished by the tibialis anterior muscle

answer

FALSE (dorsiflexion)

question

the calcaneal tendon (achilles tendon) is the largest, strongest tendon in the body

answer

TRUE

question

the epicranius or occipitofrontalis has two bellies, the frontal and occipital

answer

TRUE

question

severing of the patellar tendon would inactivate the hamstring group

answer

FALSE

question

the broadest muscle of the back is the latissimus dorsi

answer

TRUE

question

muscle spasms of the back often are due to the erector spine contraction

answer

TRUE

question

muscles connecting to the hyoid bone are important for swallowing and speech

answer

TRUE

question

the muscles of facial expression insert into skin or other muscles, not bones

answer

TRUE

question

which type of lever is demonstrated by using scissors?

answer

first-class

question

what muscle is not a major dorsiflexor?

answer

fibularis tertius

question

what is the major factor controlling how levers work?

answer

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

question

what is the main factor that determines the power of a muscle?

answer

the total number of muscle cells available for contraction

question

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

answer

agonist

question

when the term biceps, triceps, or quadriceps forms part of a muscle name what does it mean?

answer

two, three, or four origins

question

how many skeletal muscles are in the human body?

answer

over 600

question

what does the term levator mean?

answer

the muscle elevates and/or adducts a region

question

what describes the suprahyoid muscles?

answer

they are a group of muscles that lie superior to the hyoid bone and help form the floor of the oral cavity

question

what is the action of the supraspinatus?

answer

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

question

what does the extensor carpi radialis brevis do?

answer

extends and abducts the wrist and is short

question

what are the muscles that are found at the openings of the body collectively called?

answer

circular muscles

question

what muscle is involved in producing horizontal wrinkles in the forehead?

answer

the frontal belly of the epicranius

question

which group of muscles flexes and rotates the neck?

answer

the scalenes

question

which muscle is involved in crossing one leg over the other while in a sitting position?

answer

sartorius

question

what does it mean if a lever operates at a mechanical disadvantage?

answer

the load is far from the fulcrum and the effort is applied near the fulcrum

question

which muscles compress the abdomen?

answer

internal oblique external oblique transversus oblique

question

a muscle group that works with and assists the action of a prime mover is...

answer

a synergist

question

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

answer

synergist

question

what muscles are members of the hamstring?

answer

semitendinosus semimembranosus biceps femoris

question

a powerful sucking muscle that an infant develops while nursing

answer

buccinators

question

spasms of this strap like muscle that often result in wryneck or torticollis

answer

sternocleidomastoid

question

during contraction the two articulating bones move equally

answer

FALSE

question

what are the three ways of classifying muscles?

answer

muscle location the type of action they cause muscle shape

question

what is the major muscle for breathing

answer

diaphragm

question

what describes orbicular is iris?

answer

closes, purses, and protrudes the lips

question

what muscle is strained from tennis elbow?

answer

the brachioradialis

question

which muscles are contracted to exhale forcibly

answer

internal intercostals and rectus abdominus

question

paralysis of what muscle would make an individual unable to flex the thigh?

answer

iliopsoas and rectus femoris

question

first-class levers in the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location.

answer

TRUE

question

what large muscle is the adductor magnus, adductor longus, and adductor brevis a part of?

answer

medial compartment of the thigh

question

what type of lever system is described as LEF (load, effort, fulcrum)

answer

third-class lever

question

what muscle serves as a common intramuscular injection site in infants?

answer

the vastus lateralis

question

paralysis of what muscle would make an individual unable to flex the knee?

answer

hamstring muscles

question

what muscles act in plantar flexion?

answer

tibialis posterior flexor digitorum longus gastrocnemius and soleus

question

the largest energy reserve available in the muscle itself

answer

glycogen

A&P Chpt. 10 Muscles – Flashcards

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