Multiple Choice
Which cells aid in the body's defense processes by secreting histamine and heparin?
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41. Immune System
Immune System
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What typically occurs when antibodies encounter a foreign blood protein in the body?
A
The antibodies ignore the foreign protein and allow it to circulate freely.
B
The antibodies convert the foreign protein into a harmless substance.
C
The antibodies bind to the foreign protein, marking it for destruction by immune cells.
D
The antibodies directly produce new red blood cells to replace those affected.
Verified step by step guidance1
Step 1: Understand the role of antibodies in the immune system. Antibodies are specialized proteins produced by B cells that recognize and bind to specific antigens (foreign substances, such as proteins, pathogens, or toxins) in the body.
Step 2: Recognize that foreign blood proteins are considered antigens. When antibodies encounter these antigens, they do not ignore them or allow them to circulate freely. Instead, they initiate an immune response.
Step 3: Learn the mechanism of antibody action. Antibodies bind specifically to the foreign protein (antigen) using their antigen-binding sites. This binding marks the antigen for destruction by immune cells, such as macrophages or cytotoxic T cells.
Step 4: Clarify that antibodies do not convert the foreign protein into a harmless substance directly. Instead, they facilitate its removal by tagging it for immune system action.
Step 5: Note that antibodies do not produce new red blood cells. The production of red blood cells occurs in the bone marrow through a process called erythropoiesis, which is unrelated to antibody function.
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