As described by the free-radical theory, exposure to oxidizing agents results in unstable oxygen compounds that can be neutralized by antioxidants. what antioxidant does the body produce?

D)can be increased in a closed system

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later