W6 Lecture Flashcards
(19 cards)
what us an endomysium
connective tissue enclosing an individual muscle fibre
what is perimysium
connective tissue enclosing bundles of muscle fibres called fascicles
what is epimysium
connective tissue what surrounds each muscle
what is a fasciae
sheets of fibrous tissue which separate muscles from each other
what is a tendon
fibbers cords which attach mucles to bone
myofibril
a cylinder shaped organelle which runs the length of a muscle fibre and contains actin and myosin filaments
sacromere
a basic contractile unit of myofibril, which is divided into I light bands, A dark bands and Z discs
sacrolemma
the cell membrane of a skeletal muscle;
sarcoplasmic reticulum
the endoplasmic reticulum of muscle cells
sarcoplasma
the cytoplasm for skeletal muscle
transverse tubules
tunnel like infolding that pass through the muscle fibres which carries the electrical impulse from the surface of cell to the interior when there is an action potential
actin
thin contractile protein thilamnet, containing “active” or “binding” sites
myosin
thick contractile protein with a shaft like tail and myosin head
tropomyosin
an actin-binding protein that regulates muscle contraction
troponin
a complex that binds to tropomyosin and calcium
motor neuron
nerve tat stimulate the skeletal muscle to contract
synapse
the point where the end of an axon meets another cell
synaptic cleft
gap between the axon terminal and the adjacent cell where the neurotransmitter diffuses
