muscular system week 1 basics Flashcards
(24 cards)
define muscular hypertrophy
enlargement of existing muscle fibers due to increased production of myofibrils, mitochondria, sarcoplasmic reticulum, and other organelles
what is the function of skeletal muscle
- body movement
- stabilizing body positions
- facial expressions
- generating heat
where is the fascia located
underneath the hypodermis
what is fascia made of
dense irregular connective tissue
what is the function of fascia
it carries nerves, blood vessels, and lymphatic vessels
what is sarcolemma
plasma membrane of muscle fibers
where is the sarcolemma located
deep to endomysium
what does sarcolemma do
it conducts action potentials and is continuous with t-tubules
what does the agonist do
prime mover
what does the synergist do
helps the agonist
what does the antagonist do
works against the agonist
what does the fixator do
stabilizes the origin of the prime mover
define rectus
fibers run parallel to midline
define transverse
fibers run perpendicular to the midline
define oblique
fibers run diagonal to the midline
define maximus
largest
define minimus
smallest
define longus
longest
deltoid
triangular shape
rhomboid
diamond shape
trapezius
trapezoid shape
biceps
two origins
triceps
three origins
quadriceps
four origins