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Muscular System (name the muscles (transvers abdominis, soleus, temporalis…
Muscular System
name the muscles
transvers abdominis
soleus
temporalis
gastrocnemius
trapezius
gluteus maximus
sternocleidomastiod
adductor magrus
orbicularis oris
fibularis longus
masseter
biceps femoris
zygomaticus
obicularis oculi
semimembranosius
frontalis
deltoid
sartorius
tibialis anterior
triceps brachii
gracilis
adductor group
pactorlais trajor
intermap abdominal
fectus decominis
latissimus dorsi
vastus literalis
vastus medials
flex or carpi radialis
branio-radialus
rectus femoris
external oblique
adductor magus
body movement terminology
tendons: cords of fibrous connective tissue that keep muscle & bone together
insertion: muscle ends attach to bone and move when muscle contracts
ligament: cords of fibrous connective tissue that connects bone & bone
origin: end of muscle that attach to bone but don't move when contraction happens
plane or gliding joints: back and forth motion
bursae: synovial-lined sacs contain synovial fluid
ellipsoidal: variety of motins
hinge joint: convex surface fits into a concave surface
spheroidal: wide range of motion
sellar: allows movement in two plates
trochoid: cylindrical surface rotates with a ring of bone & fibrous tissue
sliding filament theory
myosin attaches to actin
myosin head moves towards the M-line
Ca++ binds to actin myofilament
repeat a lot the of times powered by ATP
nerve impulse or action potential travel down sarcolemma
Z lines get close together
structure of skeletal muscle
neuromuscular junction: connect nerves & skeletal muscle
synapse: connects nerves with muscle & other organs
motor unit: one motor neuron & muscle fiber it innervates
axon: releases neurotransmitter
motor neuron: stimulates the skeletal muscle
major functions
posture is stabilizing
motion/movement can change body position & movement of substances
thermogenesis control the heat production & helps with homeostasis
types of muscle tissue & functions/characteristics
cardiac has long, cylindrical, branched, & single central nucleus that can interconnect nature of cardiac muscle cells let the heart pump blood through the body
smooth has spindle-shaped with single central nucleus & no striation that controls movement inside internal organs
skeletal long, cylindrical, parallel, & multinucleated that can control movement and make up most of the body weight