What is the function of antibodies in donated plasma?

Antibodies in donated plasma play a crucial role in the immune system by helping to fight infections and diseases. These proteins are produced by the immune response to identify and neutralize pathogens such as bacteria and viruses. When plasma is donated, it contains these antibodies, which can be beneficial for patients with weakened immune systems or those suffering from various infections. The transfer of antibodies from donors to recipients can enhance the recipient's ability to combat infections, effectively providing a form of passive immunity. This makes the presence of antibodies in plasma essential for therapeutic uses in medicine.

The other options do not accurately describe the role of antibodies. Nutrients, oxygen transport, and fat storage are functions associated with other components of blood or bodily systems, not antibodies.