Question

IS controlling the movement of substances across the plasma membrane a function of contractile proteins?

Answer 1

No, controlling the movement of substances across the plasma membrane is not a function of contractile proteins. The movement of substances across the plasma membrane is primarily facilitated by membrane transport proteins such as channels and transporters. Contractile proteins, such as actin and myosin, are involved in cell movement and contraction rather than the regulation of substance movement across the plasma membrane.