Cell signaling can be classified to be mechanical and biochemical based on the type of the signal. 1  Mechanical signals are the forces exerted on the cell and the forces produced by the cell. These forces can both be sensed and responded by the cells. Biochemical signals are the biochemical molecules such as proteins, lipids, ions and gases.
1 You must be an American citizen at least 18 years of age (or 21 years in some states). 2  You must be able to pass a drug test and in some cases, a physical endurance exam. 3  Bailiffs are expected to have clean criminal records and be model citizens [source: CV Tips ].
A: To become a corrections officer, you must have at least a high school diploma. The educational requirements will vary from state to state. In some states you will need to have a post-secondary degree to work as correctional officer in federal prisons.