The basic unit of all forms of life

flexible barrier around all cells that maintains homeostasis

center of eukaryotic cell that contains DNA

Three fundamental requirements for life

Organism whose cells have a nucleus and other membrane bound organelles

Unicellular organism without a nucleus or other membrane bound organelles

The scientist who named "cells"

Portion of the cell outside the nucleus

structures that act like specialized organs inside a cell

small particles of RNA that produce proteins

where proteins are synthesized

where lipids are synthesized

modifies, sorts, and packages proteins and other materials for storage in the cell or release from the cell.

large saclike, membrane-enclosed structures that store materials like water, salts, proteins, and carbohydrates.

organelles filled with enzymes that break down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell.

a network of protein filaments that give cells their shape and internal organization

capture the energy from sunlight and convert it into chemical energy stored in food during photosynthesis.

convert the chemical energy stored in food molecules into compounds that are more convenient for the cell to use.

strong supporting layer around the membrane

regulates what enters and leaves the cell and also protects and supports the cell.

some substances can pass across and others cannot

Relatively constant conditions inside a cell

The process by which particles move from an area of higher concentration to an area of lower concentration

a form of diffusion through special protein channels.

water channel proteins

the diffusion of water through a selectively permeable membrane.

a solution that has an equal concentration of particles as the cell

a solution that has a higher concentration of particles than the cell

a solution that has a lower concentration of particles than the cell

the force of water moving into or out of a cell