What happens when articular cartilage is damaged? - answerRough, bristly collagen
fibers on the surface
increase in amount of friction
further damage caused
Where are blood vessels and nerves found? - answerPerimysium
Epimysium - answerincircles entire muscle belly
Endomysium - answergoes around each individual muscle fiber
, Tendons are made up of what? - answerEpimysium, perimysium, endomysium
Penninate muscle - answerFibers at an angle
convergent muscle - answerpulls in different directions; each muscle fiber contracts by
30%
myoblasts - answerembryonic cells
multinucleate - answerimportant for protein production
Z line - answerA dark thin protein band to which actin filaments are attached in a
striated muscle fiber, marking the boundaries between adjacent sarcomeres.
M line - answersupporting proteins that hold the thick filaments together in the H zone
I band - answerthin filaments only
A Band - answerthick and thin filaments
H band - answerthick filaments only
sarcoplasmic reticulum - answerstores and releases calcium
thin filaments - answerattach to z line
titin - answerelastic protein; recoils and responsible for elasticity
sliding filament theory - answerexplanation of how muscles contract
NA+ - answeroutside cell
K+ - answerinside cell
Which channels are open during repolarization? - answervoltage gated K+ channels
Action potential propagation - answerpropagated along plasma membrane
generated in less than 2 milliseconds
travels in one direction
happens in neurons and skeletal muscle
What happens without Acetycholine (ACh) - answerFlaccid paralysis
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