muscles Flashcards
diffeernce between agonist and antagonist
agonist-contracting muscle
antagonist-relaxing muscle
2 types of muscles
skeletal-conscious-ligaments
smooth-uncinsciuos-cardiac
features of a skeltal muscle tissue
lots of nuclei
lots of mitrochondira
made up of lots of myofibrils
what helps sepread action potanteial along muscle
tranverse tubule
what stores calcium and releases it
sarcoplasmic reticulum
why is phosphocreatine important+the waste product
helps assist phosphorylation of ADP into ATP as muscles require lots of ATP+
creatine is the waste
slow twitch fibres features
large store of myoglobin+rich blood supply+mitrochondira
respire for aerobically for longer amounts of time-endurance-darker
fast twitch fibres
larger sotre of glycogen + phosphocreatine +high conc of anaerobic respiration enzymes
faster contraction
sliding filament theory
a.p. from neuromuscular joint reaches muscle
calcium ions enter causing protein tropomyosin to uncover binding site
adp is attatced to mysoin allows it to form a cross bridge with actin
angel of cross bridge causes acrtin to slide along myosin-adp is released
atp then attaches to myosin head-detaching from actin
atpases activated by calcium ions hydrolyse atp -allwoing mysoin to return to original position
what is the A band+what happens when it contracts
length of myosin-constant
what is the h zone+what happens when it contracts
myosin by itslef dcerases in size
what is the i band+what happens when it contracts
actin by itself decreases
what is the z line decreases+what happens when it contracts
length of sarcomere move together
