Innate defenses - guard against pathogens
Adaptive defenses - respond to specific foreign pathogens
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Innate defenses are the body's first line of defense against pathogens and are non-specific, meaning they target any foreign invader. Adaptive defenses are more specific and target particular pathogens, developing over time as the body is exposed to different threats. Innate defenses are always present and ready to act, while adaptive defenses take time to develop but provide long-lasting immunity.
Yes, non-specific (innate) body defenses are the general defense mechanisms that act against any type of pathogen without prior exposure or memory. Specific (adaptive) defenses, on the other hand, are tailored responses that target specific pathogens using memory cells developed after initial exposure.
Toll-like receptors are part of the innate immune system.
The two types of immunity are innate immunity and adaptive immunity. Innate immunity is the body's first line of defense and includes physical barriers like skin, as well as immune cells that respond to general threats. Adaptive immunity is more specific and involves the production of antibodies and immune memory to target particular pathogens.
The classical pathway is part of the adaptive immune response and is triggered by specific antibodies binding to pathogens. The alternative pathway is part of the innate immune response and is activated by the presence of foreign substances on the surface of pathogens.
Innate immunity is found in all multicellular organisms and is the first line of defense against pathogens. It includes physical barriers like the skin, as well as cellular components like macrophages and natural killer cells, and proteins like cytokines and complement proteins. Unlike adaptive immunity, innate immunity provides immediate, non-specific protection.