Muscles Word Scramble
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Term | Definition |
Contractility | the ability of skeletal muscle to shorten with force |
excitability | the capacity of skeletal muscle to respond to a stimulus |
extensibility | the ability to be stretched |
elasticity | ability to recoil to their original resting length after they have been stretched |
epimysium | connective tissue sheath surrounding the skeletal muscle |
fascia | connective tissue located outside the epimysium |
fibers | single muscle cells |
myofibrils | cytoplasm of each fiber |
actin myofilaments | thin myofilaments |
myosin myofilaments | thick myofilaments |
motor neurons | nerve cells that carry action potentials to skeletal muscle fibers |
2 major protein fibers | actin myofilaments myosin myofilaments |
occipitofrontalis | raises the eyebrows |
orbicularis oris | puckers the lips |
buccinator | flattens the cheeks |
zygomaticus | smiling muscles |
levator labii superioris | sneering |
depressor anguli oris | frowning |
mastication | chewing |
sternocleidomastoid | prime mover |
intrinsic tongue muscles | shape of tongue |
extrinsic tongue muscle | moves the tongue |
orbicularis oculi | closes the eyelids |
fast twitch fibers | white meat (breast) |
slow twitch fibers | dark meat (legs) |
isotonic | equal tension |
isometric | equal distance |
origin | head |
origin | most stationary end of the muscle |
insertion | end of the muscle undergoing the greatest movement |
belly | muscle between the origin and insertion |
synergists | muscles that work together to accomplish specific movement |
antagonists | muscles that work in opposition to one another |
anaerobic | without oxygen |
aerobic | with oxygen |
muscle fatigue | when ATP is used during muscle contraction |
oxygen debt | amount of oxygen needed in chemical reactions |
all or none response | phenomenon |
sliding filament mechanism | sliding of actin myofilaments past myosin myofilaments during contraction |
external intercostals | elevate the ribs during inspiration |
internal intercostals | contract during forced expiration |
diaphragm | accomplishes quiet breathing |
linea alba | tendinous area of the abdominal muscle |
trapezius | rotates scapula |
serratus anterior | pulls scapula anteriorly |
pectoralis major | adducts and flexes the arms |
latissimus dorsi | medially rotates, adducts, and powerfully extends the arm |
deltoid | attaches the humerous to the scapula and clavicle, major abductor of the upper limb |
triceps | extends the forearm, anterior |
biceps | flexes the forearm, posterior |
brachialis | flexes the forearm |
brachioradialis | flexes and supinates the forearm |
retinaculum | strong band of fibrous tissue that covers the flexor and extensor tendons |
flexor carpi | flexes the wrist |
extensor carpi | extends the wrist |
flexor digitorum | flexes the fingers |
extensor digitorum | extends the fingers |
gluteus maximus | butt |
quadriceps | extends the leg; anterior |
sartorius | tailors muscle; flexes the thigh |
hamstring | posterior thigh muscles |
Created by:
haleighkuhn13
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