<span>im only sure about 1
4)an illness due to a pathogen that usually affects people with a weakened immune system
</span>with viral load
Answer:
D
Explanation:
myosin heads form cross bridges and pull thin filaments causing them to slide.
the presence of acetocholene causes calcium to be released causing depolarization of the sarcoplasmic reticulum and changing its shape. the myofilaments together with actin allows the myosin to form cross bridges along the muscle fibers and releases ATP for movement of the muscle.
Answer:
sad no one is helping me on my math
Explanation:
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