Textbook Question
Eileen presents with flu-like symptoms, including fever, chills, and body aches.
What part of the immune response is likely producing these symptoms?
21. The Immune System
Phagocytosis
Problem 16
Textbook Question
Compared with innate defenses, adaptive defenses
(a) Do not distinguish between one threat and another
(b) Are always present at birth
(c) Protect against threats on an individual basis
(d) Deny the entry of pathogens to the body
Verified step by step guidance1
Step 1: Understand the difference between innate and adaptive defenses. Innate defenses are the body's first line of defense and respond to threats in a general, non-specific way, while adaptive defenses are specific and tailored to particular pathogens.
Step 2: Analyze option (a): 'Do not distinguish between one threat and another.' This describes innate defenses, which respond broadly, so adaptive defenses actually do distinguish between different threats.
Step 3: Analyze option (b): 'Are always present at birth.' Innate defenses are present at birth, but adaptive defenses develop and improve after exposure to specific pathogens.
Step 4: Analyze option (c): 'Protect against threats on an individual basis.' Adaptive defenses are specific to particular pathogens and provide targeted protection, which matches this description.
Step 5: Analyze option (d): 'Deny the entry of pathogens to the body.' This is primarily a function of innate defenses like skin and mucous membranes, not adaptive defenses.
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Innate Defenses
Innate defenses are the body's first line of defense against pathogens, present from birth. They provide a general, non-specific protection by recognizing common features of pathogens but do not target specific threats individually.
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Adaptive Defenses
Adaptive defenses are specialized immune responses that develop after exposure to specific pathogens. They recognize and remember individual threats, allowing for targeted and more effective protection upon subsequent encounters.
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Specificity and Memory in Immunity
Adaptive immunity is characterized by its ability to distinguish between different pathogens and remember them. This specificity enables the immune system to mount a tailored response to each threat and improve defense over time.
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