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Defintions

TermDefinition
Occipitofrontalis raises the eyebrows
orbicularisoculi closes the eyelids
orbicularis oris puckers the lips
buccinator flattens the cheeks
Zygomaticus smiling muscle
Levator labii superioris sneering
depressor anguli oris frowning
sternocleidomastoid lateral neck muscle and prime mover
platsyma sheetlike muscle that covers the anterolateral neck
erecotor spinae group of muscles on each side of the back
external intercostal elevate the ribs during inspirtation
internal intercostals contract during forced expiration
diaphragm accomplishes quiet breathing
one of the strongest muscles temporalis
trapezius rotates scapula
serratus anterior pulls scapula anteriorly
pectoralis major adducts and flexes the arm
Latissimus dorsi medially rotates, adducts, and powerfully extends arm
deltoid attaches the humerous to the scapula and clavicle
triceps brachii extends the forearm
biceps brachii flexes the forearm : occupies the anterior compartment of arm
brachialis flexes forearm
brachioradialis flexes and supinates the forearm
retinaculum strong band of fiberous connective tissue that covers the flexor and extensor tendons and holds them into place around the wrist so that they don't bowstring during muscle contraction
flexor carpi flexes the wrist
extensor carpi extends the wrist
flexor digitorumf flexes the fingers
extensor digitorum extends the fingers
intrinsic hand muscles located within hand
interossi muscles located between the metacarpals
gluteus maximus buttocks
quadriceps femoris extends the leg; anterior thigh muscle
sartorius tailors muscle (flexes the thigh)
hamstring posterior thigh muscles; flexes the leg and extends the thigh
Gastrocnemius and soleus form of the calf muscle
Calcaneal tendon also known as Achilles tendon
Lateral muscle of the leg peroneus
instrinsic foot muscles flex, extend, abduct, and adduct the toes
extrinsic moves the tongue
instrinsic changes the shape of the tongue
Tendinous inscriptions cross the rectus abdominis at three or more locations
linea alba consists of white connective tissue rather than muscle
on each side of the linea alba is the Rectuys Abdominis
contraction process of becoming smaller
Muscle Fibers Cell composed of my fibers that contract when stimulated
Skeletal muscle connected to the skeleton to form part of mechanical system
endomsyium ensheaths each individual myocyte
Perimsyium shealth of connective surrounding a bundle of muscle fibers
Epimysium fiberous elastic tissues surrounding a muscle
Fasicle Bundle of structures
Smooth Muscle contractile fibers are not highly ordered
Cardiac Muscle Another term for myocaridum
Sarcolemma fine transparent tubular shealth
sarcomere structural unit of a myofiber in striated muscle
myosin fibrous protein that forms the contractile filaments of muscle
Actin protein that forms (together with myosin)
Sarcoplasmic reticulum specialized endoplasmic of cardiac muscle
motor unit made up of a motor neuron and the skeletal muscle
axon long threadlike part of a nerve cell
Acetylcholine Compound that occurs throughout the nervous system
Muscle Fatigue Muscle to generate force
Isotonic Contractions length of muscle changes
Isometric contractions strength training in which joint angle and muscle length do not change
origin where something begins
insertion action of inserting something
synergists a substance organ
antagonist substances that inhibits physiological action
fixators muscle that acts of a stabilizer
four major functional characteristics contractility, excitability, elasticity, extensibility
each skeletal muscle is surrounded by a connective tissue shealth called Epimysium
Fascia another connective tissue located outside epimysium
Muscle composed of numerous visible bundles Fasiculli
Each side of a "Z line" is an I band
What kind of line is in between two A bands? M line
Contractility shorten with force
Excitability capacity to respond to a stimulus
extensibillity ability to stretch
elaasticity ability to recoil to original stretch
muscle fiber single cylindril cell containing several nuclei
Created by: AddisonFerguson