What is the principal component of the thickest layer of the skin? a: collagen b: elastin c: mast cells d: phagocytes what is the tough protein that is one of the primary components of bones? e: collagen f: fibrinogen g: peptin h: periosteum what is the role of the proteins actin and myosin? i: attaching bones to bones j: attaching muscles to bone k: contacting the muscles l: storing energy

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

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs