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muscle system

Muscular system Provides mobility and movement, produces heat
Tendons anchor muscles to bone and other muscles
sarcolemma special name for the cell membrane of a m. cell
sarcoplasm special name for cytoplasm of a m. cell
muscle fiber a skeletal muscle cell is called a ________
fascicles muscle fibers are grouped into bundles called _________
perimysium fascicles are surrounded by _________
Actin thin contractile proteins that interact with myosin
myosin thicker contractile proteins
titin protein that anchors myosin to the Z line
T-tubules tubes that allow signals to travel into the cell
sarcoplasmic reticulum ER of the m. cell, stores calcium ions
Origin where muscle begins
Belly the thick middle part of a muscle
insertion opposite end of the origin
Heads muscles that have more than one belly
Action the movement a muscle causes when it contracts
Prime mover the primary muscle that brings about the desired movement
Antagonist the muscle that does the opposite of the prime mover
synergist secondary muscle that brings about the desired movement, assists prime mover
thermogenesis heat produced from the normal muscle metabolism
Maximus Largest
Minimus Smallest
Major large
Minor small
longus long
brevis short
deltoid triangular
Rhombus diamond shape
sarratus sawtoothed
trapezius trapezoidal
pectoralis chest
brachio upper arm
radialis radius b.
gluteus buttock
femoris femur
sterno sternum
cleido clavicle
Mastoid mastoid process
digiti finger or toe
pollicis thumb
hallicus big toe
lateralis lateral
medialis medial
intermedius middle
profundus deep
superficialis superficial
biceps 2 heads
triceps 3 heads
quadriceps 4 heads
Rectus straight
transverse sideways/across
oblique diagonal
Adductor adducts
abductor abducts
Flexor flexes
extensor extends
levator elevates
frontalis raises eyebrows
orbicularis oculi closes eyes
masseter closes jaw
temporalis closes jaw
sternocleidomastoid flexes head "prayer muscle"
orbicularis oris draws lips together
rectus abdominis flexes lumbar region to allow bending forward
external oblique stabilizes spine
internal oblique stabilizes spine to maintain posture, permits rotation at waist
transversus abdominis compresses contents of abdomen
linea alba band of connective tissue in the abdomen
Deltoid abducts, flexes, and rotates arm
pectoralis major flexes and adducts upper arm
serratus anterior pulls shoulder down and forward
latissimus dorsi adducts and extends the arm backwards
trapezius raises or lowers shoulders
brachialis flexes the forearm (ulna)
biceps brachii flexes the forearm (radius)
triceps brachii extends the forearm
brachioradialis helps flex the forearm
hand and digit extensors extends the wrist
hand and digit flexors flex the wrist
sartorius adducts and flexes the leg, permits sitting "cross legged"
adductor group adduct the thigh
quadriceps femoris flexes the thigh, extends the leg
gluteus maximus extends the and rotates the thigh outward
gluteus medius abducts and rotates the thigh outward
gluteous minimus abducts and rotates the thigh
hamstrings extend the thigh
gastrocnemeus plantar flexion of the foot
soleus plantar flexion of the foot
Thick filaments Consists of hundreds of myosin molecules stacked together, With the myosin heads facing outward
Thin filaments Consisting of two chains of the contractile protein actin
direct attachment muscle fibers merge with the periosteum of the bone
indirect attachment the epimysium extends past the muscle as a tendon
striated striped
involuntary muscle contracts automatically
voluntary muscles contract at will
synaptic cleft between the end of the motor nerve and the muscle fiber
neuromuscular junction the connection between a motor neuron and a muscle fiber
motor units the neuron and all the fibers it stimulates
extensor digitorum longus dorsiflexion of the foot
treppe the phenomenon, in which each successive twitch contracts more forcefully than the previous one
incomplete tetanus the condition of rapid contraction with only partial relaxation
complete tetanus twitches merge into one prolonged contraction
Muscular system Include the skeletal muscles and accessory muscles
cardiac, smooth Muscular system includes the skeletal muscles, not the _____ or _____ muscle
cells Each molecule is made up of thousands of individual muscle _____
sarcoplasm Fibrils are fibers of the muscle cell that are bound together within the cell membrane and a layer called _____
muscle Fascicles are bundled into the ______
Contraction Muscle cells are specialized for _________
Movement Fibers shorten to produce _____
Fibrose Tendons are made of dense _____ connective tissue
Deep fascia Tendons continuation of ________ that covers the muscle
Periosteum Tendon merges with the _____ to anchor to bone
Myofibrils Sarcoplasm is filled with _______
Glycogen and oxygen Myofibrils store ______
Sarcomeres The contractile units in the muscle fiber
Myophilements Bundles of sarcomeres
Myophilements Made up of actin and myosin
Z line Forms the end boundaries of the sarcomere
Cross bridge Actin forms a _____ with myosin which shortens the sarcomere
Created by: Darren24



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