Specific proteins produced by cells of the immune system in response to the presence of foreign molecules that circulate in the serum and are present in secretions such as saliva are called:
A)antigens.
B)immunoglobulins.
C)cytokines.
D)phagogens.

Question

Quizplus · Accepted Answer

Produced by B lymphocytes in response to the presence of foreign molecules,immunoglobulins (antibodies)are present in serum and in secretions such as saliva and are the central molecule of the immune response.

Specific Proteins Produced by Cells of the Immune System in Response