Muscle Contraction & Motor Proteins Flashcards
motor proteins use ATP to do what
‘walk’ on actin filaments or microtubules
myosin walk on
actin filaments
kinesis and dynamics walk on
microtubules
cell membrane is “pushed” by what
actin filaments
different myosins have different functions what are the functions
muscle contration, cytokinesis, transport of vesicles and organelles inside the cells
myosin binds to actin when
the phosphate is removed which causes a power stroke
what allows release from the actin
ATP
what recocks the reaction
ADP + Pi causing hydrolysis
myosin binding to actin is regulated by what
calcium
calcium bind to what to activate
troponin
troponin pushes what to the side in order to unblock the binding to myosin
tropomysin
where is skeletal muscle found
biceps triceps
what is skeletal muscle and is it voluntary or involuntary
attaches skin and bones to make voluntary movements
what is smooth muscle tissue and is it involuntary or voluntary
thick and thin filaments that are in hollow walls to aid in blood flow and digestion it is involuntary
where is smooth muscle tissue found
hollow walls of organs like the stomach and intestine
where is cardiac muscle found and is it involuntary or voluntary
only found in the heart and is involuntary
what is tropomyosin
it covers actin filaments preventing myosin binding
what is troponin
it moves tropomyosin and is activated by calcium
myosins bundled together are what
motor proteins
what does titin do
works as a spring to link myosins to the Z line
what does alpha-actinin do
it links actin filaments to the Z line
