Plz ! when you exercise, your muscles are hard at work! to allow your muscles to do all that work, they need more nutrients and oxygen delivered to them so they will have the energy they need. which body system supply them with those necessary things? a. digestive and respiratory b. circulatory and respiratory c. circulatory and excretory d. respiratory and skeletal

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis