Dr. Rider, however, said the cells "require little or no maintenance."

It also appears in spreadsheets when two cells require each other's result.

Sanyo, which uses different technology, says its cells can generate more electricity at higher temperatures, and require less energy to produce.

Now, as a carbon-based life form, my cells require regular fluid intake to survive.

If a cell "requires penetration, within legal bounds, it will be done," he said.

Active transport is a good example of a process for which cells require energy.

That is, if exposed to bright sunlight, the cell would require many minutes to return to normal operation and sensitivity.

No one knows why such cells require the injection of stem cells to spring into action.

Developing and programming cell repair machines will require great effort, knowledge, and skill.

When built, artificial cells require only a point process, with its parameters defined.