Patient Care Technician (PCT) AAH Practice Exam

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What type of blood cells are responsible for producing antibodies?

Hemocytes
Erythrocytes
Neutrophils
Lymphocytes

The correct answer is: Lymphocytes

Lymphocytes are a critical component of the immune system, specifically responsible for the production of antibodies. When the body encounters foreign substances, such as bacteria or viruses, lymphocytes—particularly a subtype known as B cells—are activated. These B cells differentiate into plasma cells, which then produce antibodies tailored to bind with specific antigens from the pathogens. This process is an essential part of the adaptive immune response, allowing the body to remember past infections and respond more efficiently upon future encounters. Understanding the role of lymphocytes in antibody production is key for anyone studying healthcare or immunology, as it emphasizes the importance of these cells in protecting the body against disease.