College of Massage Therapists of British Columbia (CMTBC) Practice Exam

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What is the main function of antibodies in the immune system?

To store energy
To transport oxygen
To identify and neutralize pathogens
To regulate body temperature

The correct answer is: To identify and neutralize pathogens

Antibodies play a crucial role in the immune system by identifying and neutralizing pathogens such as bacteria and viruses. They are specialized proteins produced by B cells in response to antigens, which are foreign substances that trigger an immune response. Once antibodies bind to these antigens, they can neutralize the pathogens directly or mark them for destruction by other immune cells. This process is vital for protecting the body from infections and enhancing the overall immune response. The other options do not align with the primary function of antibodies. Storing energy is associated with various biomolecules such as carbohydrates and fats, not antibodies. Transporting oxygen is primarily the role of hemoglobin found in red blood cells, while regulating body temperature involves different physiological mechanisms, such as sweating and shivering, rather than the action of antibodies.