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:
Im going to have to say it is D. trait
Explanation:
~Hello there!
Your question: How many sperm cells are produced by the average human male?
Your answer: An average human can produced 525 billion sperm cells.
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