Final answer:
True, Selenium is a critical component of the enzyme glutathione peroxidase, serving an antioxidant function in the body. It also acts as a cofactor for other essential enzymes, aiding in tissue respiration and preventing oxidative damage.
Step-by-step explanation:
True, Selenium does indeed function as part of an antioxidant enzyme system. It is an essential component of glutathione peroxidase, which is an enzyme that plays a crucial role in protecting the body from oxidative damage by catalyzing the conversion of reduced glutathione to its oxidized form. Additionally, Selenium is a cofactor for several other enzymes, including sulfite oxidase, xanthine oxidase, and aldehyde oxidase.
Selenium's antioxidant properties contribute to tissue respiration and provide protection against peroxidation in tissues and membranes. Despite these benefits, it is important to maintain appropriate levels of selenium intake as excessive amounts can cause a toxic effect known as selenosis.