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ch6 flash cards

muscular system

TermDefinition
skeletal muscle muscle tissue connected to bones, striated and voluntary
cardiac muscle involuntary muscle tissue only found in the heart
smooth muscle muscle tissue found walls of body organs
contractility the degree which muscle fibers can be shortened
irritability the ability of a muscle to contract in response to stretching
muscle fiber a muscle cell composed of actin and myosin
sriated found in cardiac and skeletal muscle
voluntary controllable movement
endomysium connective tissue covering muscle fiber
perimysium connective tissue covering bundles of muscle fibers
fascicle bundle of skeletal muscle fibers surrounded by perisium
epimysium connective tissue covering the entire skeletal muscle
tendon attaches muscle to bone
aponeuroses layers of flat broad tendons
tendons attach bone to bone
sarcolemma cell membrane of striated muscle fiber cell
myofibril elongated contractile threads found in muscle cells
sarcomere basic unit of striated muscle tissue
I band (light) part of sarcomere lighter contains thin filaments but no thick filaments
A band (dark) middle area of sarcomere where thick and thin filaments are found
z disc/line line formed between adjacent sarcomeres
h zone region of striated muscle fiber that contains only thick myosin filaments
m line attachment site for the thick filaments in a sarcomere
titin large fibrous protein that connects thick myosin filaments to z discs
myofiliments chains of actin and myosin
actin protein that form together with myosin contractile filaments of cells
regulatory proteins proteins that regulate contractile muscle by controlling the interaction of myosin and actin
myosin protein that converts chemical energy in the form of atp to mechanical energy
myosin crossbridges formation of myosin and actin
motor unit works together to coordinate the contractions of a single muscle
axon transmit information to neurons muscles and glands
aerobic process of producing cellular energy involving oxygen
anaerobic process of producing cellular energy without oxygen
glycolysis breaks down glucose
lactic acid organic compound produced when glucose is broken down
flexion bending movement
extension straightening movement
rotation referring towards or away from center of body
abduction` motion that pulls away from midline of body
adduction motion that pulls toward midline of body
circumduction combination of flexion extension adduction and abduction
dosiflexion when the toes are brought closer to shin
plantar flexion movement which decreases the angle between sole of foot and back of leg
inversion movement of sole towards median plane
eversion movement of sole away from median plane
supination rotation of palm or sole facing psteriorly
antagonist a muscle that opposes the action of another
synergist muscle that act on moveable joints
trapezius rotates scapula
serratus anterior pulls scapula anetiorly
pectoralis major adducts and flexes arm
occipitofrontalis raises the eyebrow
orbicularis oculi closes eyelid
orbicularis oris puckers the lip
buccinator flattens cheeks
zygomaticus smiling muscle
levator labii superioris sneering muscle
depressor anguli oris frowning
mastication chewing
errector spinae group of muscles on each side of back
intrinsic tongue muscles change shape of tongue
extrinsic tongue muscles move tongue
gluteus maximus buttocks
sartorius flexes thigh
hamstring flexes leg and extends thigh
gastrocnemius and soleus form calf muscle
achilles tendon flex foot and toes
deltoid attaches humerus to scapila and clavical
triceps brachii extends forearm
biceps branchii flexes forearm
brachialis flexes forearm
Created by: leahnoble25