3. Which of the following plasma proteins is not produced by the liver? 1. fibrinogen 2. alpha globulin 3. beta globulin 4. immunoglobulin

The correct answer is 4. immunoglobulin.<br /><br />Immunoglobulins, also known as antibodies, are not produced by the liver. They are produced by plasma cells, which are a type of white blood cell. The liver produces several plasma proteins, including fibrinogen, alpha globulin, and beta globulin. These proteins play important roles in blood clotting, immune response, and other physiological processes.