Which of the following plasma proteins is most abundant in plasma?
A. Albumin.
B. Globulin.
C. Fibrinogen.
D. Immunoglobin.
Albumin (~5 g./100 ml. of plasma) is approximately 2.5 times more abundant than globulin (2g. / 100 ml. of plasma). Fibrinogen and immunoglobulins are present in small amounts compared to albumin.