Multiple Choice
In the lymphatic system, what structure is primarily responsible for filtering out impurities from lymph?
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41. Immune System
Immune System
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Cell-mediated immunity differs from humoral immunity in that __________.
A
it is effective only against extracellular pathogens
B
it primarily involves T lymphocytes rather than B lymphocytes
C
it relies on the production of antibodies to neutralize pathogens
D
it is responsible for the production of memory B cells
Verified step by step guidance1
Understand the two main types of adaptive immunity: humoral immunity and cell-mediated immunity. Humoral immunity primarily involves B lymphocytes and the production of antibodies to neutralize extracellular pathogens, while cell-mediated immunity primarily involves T lymphocytes and targets intracellular pathogens.
Recognize that cell-mediated immunity is effective against pathogens that reside within host cells, such as viruses or certain bacteria, and does not rely on antibodies for its function.
Identify the key players in cell-mediated immunity: T lymphocytes, including cytotoxic T cells (which directly kill infected cells) and helper T cells (which assist other immune cells). Memory T cells are also formed to provide long-term immunity.
Compare this to humoral immunity, which involves B lymphocytes that produce antibodies to neutralize pathogens in extracellular spaces. Memory B cells are also formed in humoral immunity for long-term protection.
Conclude that the correct answer is: 'it primarily involves T lymphocytes rather than B lymphocytes,' as this is the defining characteristic of cell-mediated immunity.
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