Muscle Flashcards
which muscle types are controlled by the autonomic nervous system
cardiac and smooth
which muscle type is responsible for voluntary movement of the skeleton
skeletal muscle
other than voluntary movement of the skeletal, what else is skeletal muscle functioning for
subconscious movement like balance and posture
what type of cells are found in the skeletal muscle fibres
elongated cylindrical cells
describe the nuclei of skeletal muscle cells
peripherally located, multiple
what is the main tissue type in skeletal muscles
skeletal muscle fibres
other than the skeletal muscle tissue, what other tissues compose skeletal muscles
nervous tissue
blood vessels
connective tissues
what are fascicles wrapped by
perimysium
what are individual muscle fibres wrapped by
endomysium
what are muscles wrapped by
epimysium
what kind of connective tissue is perimysium
loose
what is the cell structure of skeletal muscle specialised for
contraction
what makes up each individual muscle fibre
numerous myofibrils
what gives rise to the striated appearance of skeletal muscle
the arrangement of the myofibrils
what are myofibrils composed of
myofilaments
what are the dark bands on myofibrils
myosin
what are the light bands on myofibrils
actin
what bisects the actin binds
z lines
what is the function of z lines
to divide each myofibril into contractile units called sarcomeres
what are sarcomeres
contractile units of skeletal muscle tissue
how do sarcomeres contract
sliding filament mechanism
what innervates skeletal muscle
somatic motor neurons
what is the ratio of neuron to muscle fibre
an individual motor neuron can innervate several fibres
what is a motor unit
the combination of a single motor neuron together with all the muscle fibres