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Question
Biology
Posted 10 months ago
How will you differentiate the first line of immune defense from the third line of defense? which one is congenital or by birth protecting us?
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Answer from Sia
Posted 10 months ago
Answer
The first line of immune defense is innate and present at birth, providing immediate protection, while the third line of defense is adaptive, developing specificity and memory after exposure to pathogens.
Solution
a
Innate immunity: The first line of defense is part of the innate immune system, which includes physical barriers like skin and mucous membranes, as well as chemical barriers like stomach acid and enzymes in saliva
b
Adaptive immunity: The third line of defense is part of the adaptive immune system, which involves lymphocytes (B cells and T cells) that recognize specific antigens and have memory, allowing for a stronger response upon re-exposure to the same pathogen
c
Congenital presence: The first line of defense is congenital, meaning it is present at birth and does not require prior exposure to pathogens to be effective
Key Concept
Innate vs. Adaptive Immunity
Explanation
The first line of defense is innate and congenital, providing immediate protection without prior exposure to pathogens, while the third line of defense is adaptive, requiring exposure to develop specificity and memory.

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