Cell Boundaries

All cells have cell membranes

• A.

  True

• B.

  False

Cell membranes regulate what enters and leave the membrane

• A.

  True

• B.

  False

Cell membranes provide no support to the cell

• A.

  True

• B.

  False

Diffusion causes many substances to move across a cell membrane.

• A.

  True

• B.

  False

Diffusion requires the use of cellular energy

• A.

  True

• B.

  False

__________________ is the diffusion of water through a selectively permeable membrane.

________________________ is the energy requiring process that moves materials across a cell membrane against a concentration gradient.

_________________________ may be transported by movements of the cell membrane.