Which of the following correctly describes humoral immunity? A) It is characterized by the presence of immune cells in tissues. B) It functions exclusively within lymphoid organs.... Which of the following correctly describes humoral immunity? A) It is characterized by the presence of immune cells in tissues. B) It functions exclusively within lymphoid organs. C) It is predominantly reliant on physical barriers. D) It relies on circulating antibodies to combat pathogens.
Understand the Problem
The question is asking about the concept of humoral immunity and which option correctly describes it. Humoral immunity is an aspect of the immune system that involves the production of antibodies by B cells, which circulate in the blood and lymphatic system to defend against pathogens.
Answer
D) It relies on circulating antibodies to combat pathogens.
The final answer is D) It relies on circulating antibodies to combat pathogens.
Answer for screen readers
The final answer is D) It relies on circulating antibodies to combat pathogens.
More Information
Humoral immunity is part of the adaptive immune system and is primarily mediated by B cells that produce antibodies. These antibodies function to neutralize pathogens or mark them for destruction, primarily in the bloodstream and extracellular spaces, rather than within tissues or relying on physical barriers.
Tips
A common mistake is confusing humoral immunity with cellular immunity, which involves immune cells directly attacking pathogens.
Sources
- Physiology, Immune Response - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
- The Humoral Immune Response - Immunobiology - NCBI Bookshelf - ncbi.nlm.nih.gov
- Cells of the Immune System - an overview | ScienceDirect Topics - sciencedirect.com
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