Final answer:
Antibodies, also known as immunoglobulins or gamma globulins, are found in the gamma fraction of serum. They play a crucial role in the immune system by binding to foreign objects and protecting the body.
Step-by-step explanation:
Antibodies are found in the gamma fraction of serum. Specifically, antibodies are also known as immunoglobulins or gamma globulins, serving as antigen-specific proteins produced by B lymphocytes.
Unlike albumin, which is the most abundant plasma protein and functions mainly in transporting hormones and fatty acids, buffering pH, and maintaining osmotic pressures, immunoglobulins are essential for immune defense. They bind to foreign objects such as bacteria and viruses, thus protecting the body. The gamma globulins diverge from alpha and beta globulins, which are responsible for transporting substances like iron and lipids and contribute to osmotic pressure but are not involved in immunity.