Multiple Choice
Which of the following is NOT an antigen-presenting cell (APC)?
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21. The Immune System
Introduction to Cells of the Immune System
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Which of the following describes the function(s) of lymphocytes?
A
They produce antibodies and regulate immune responses.
B
They act as the first line of defense by forming physical barriers.
C
They are primarily involved in the phagocytosis of pathogens.
D
They transport oxygen and carbon dioxide throughout the body.
Verified step by step guidance1
Identify the primary function of lymphocytes in the immune system. Lymphocytes are a type of white blood cell crucial for adaptive immunity.
Understand that lymphocytes are mainly involved in the production of antibodies and regulation of immune responses. This is a key function of B cells, a type of lymphocyte.
Differentiate between the roles of different types of lymphocytes: B cells produce antibodies, while T cells help regulate immune responses and attack infected cells.
Recognize that lymphocytes are not involved in forming physical barriers or phagocytosis. These functions are associated with other components of the immune system, such as skin and macrophages, respectively.
Clarify that lymphocytes do not transport oxygen and carbon dioxide. This function is performed by red blood cells, not lymphocytes.
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