Final answer:
Out of the plasma proteins listed, gamma globulin (immunoglobulins or antibodies) are not produced by the liver but by specialized leukocytes known as plasma cells. The liver produces fibrinogen, beta globulins, and albumin.
Step-by-step explanation:
The question you're asking pertains to which of the following plasma proteins are not produced by the liver: 1) fibrinogen, 2) beta globulins, 3) albumin, 4) gamma globulin. To answer this, we must look at where each protein is synthesized.
Fibrinogen, like albumin and the alpha and beta globulins, is produced by the liver. It plays a crucial role in blood clotting. Albumin is also synthesized by the liver, accounting for most of the osmotic pressure of plasma. In the category of globulins, alpha and beta globulins are liver-produced proteins involved in the transport of various substances.
Among the choices given, gamma globulin, also known as immunoglobulins or antibodies, is the one not produced by the liver. Instead, they are produced by specialized leukocytes known as plasma cells and are key components in the immune response.