Biology Crossword

cell that does not have a nucleus or other membrane-bound organelles.
small cylinder-shaped organelle made of protein tubes arranged in a circle; aids mitosis.
the characteristic of a membrane that allows some substances through but not others
movement of molecules across the cell membrane without energy input from the cell.
diffusion of water molecules across a semipermeable membrane from an area of high water concentration to an area of low water concentration.
solution that has a higher concentration of dissolved particles compared with another solution.
diffusion of molecules assisted by protein channels that pierce a cell membrane.
solution that has an equal concentration of dissolved particles compared with another solution.
energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration.
release of substances out a cell by the fusion of a vesicle with the membrane.
uptake of liquids or large molecules into a cell by inward folding of the cell membrane.
the substance that is dissolved
the liquid that dissolves a substance; within living organisms, this is always water
a protein embedded within or found on the surfaces of the plasma membrane; acts as enzymes.
a membrane protein found on the exterior or interior surfaces of membranes.