the muscular system: anatomy Flashcards
types of muscle tissue (3)
skeletal
cardiac
smooth
where is skeletal muscle found
in the main organs
where is cardiac muscle found
in the heart
where is smooth muscle found
other organs
what is the function of muscle tissue
to contract (shorten)
what are the 4 main functions the muscular system has on the body
movement
stabilize joints
maintain posture and position
generate heart
what is the origin of a skeletal muscle
end of a muscle that attaches to bone that doesn’t move when muscle contracts
what is the insertion of a skeletal muscle
end of muscle attached to bone that moves when muscle contracts
what is the body of a skeletal muscle
the main part of a muscle
the part that does the contracting
what are the attachment methods (2)
tendons (muscle to bone)
some muscles attach directly to bone without tendons
anatomy of a skeletal muscle
muscle fibers which are surrounded my endomysium found inside fesicles which are surrounded my perimysium found inside the muscle which is surrounded by epimysium
(mfe-fp-me)
what is sarcolemma
plasma membrane of the muscle fiber
what is sarcoplasm
cytoplasm of the muscle fiber
what are myofibrils
long rod like structures
what is sarcoplasmic reticulum
covers all the myofibrils like a net
what does sarco mean
it always means muscle
what is a sarcomere
the smallest functional unit of of a muscle fiber
it’s what does the contracting
what are the different types of myofilaments
thick filaments
elastic filaments
thin filaments
what is a thick filament
made of protein myosin
have ATP binding head groups
what are elastic filaments
made of protein titin
what are thin filaments
made of protein actin, tropomyosin and troponin
have myosin binding sites
the 3 main muscle groups
upper body
lower body
thorax and abdomen
what’s the moving in the shoulders
trapezius
what’s the moving in the arm
deltoid
pectoralis major
latissimus dorsi
