In this option, students focus on the production of potential difference and subsequent currents in the human body. They explore the role of electricity in nerve transmission, in sensation, and in the heart. The effects of current through the body are considered, including the operation of artificial stimulators and the use of heart defibrillators to restore heart beat. Students investigate an issue related to the production or use of electricity by the body.
On completion of this unit, the student should be able to explain the electrical behaviour of the human body and apply electricity concepts to biological contexts.