Learning Path
Question & Answer
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The body produces heat to directly kill pathogens
Immune cells release pyrogens that signal the hypothalamus to raise the body's temperature
Increased metabolism from the infection generates excess heat
The body absorbs heat from the external environment to combat the infection
Understanding the Answer
Let's break down why this is correct
Immune cells release small proteins called pyrogens. Other options are incorrect because The belief that the body simply makes heat to kill germs misses the signal step; Infection does raise metabolic activity, but the fever is not just a side effect.
Key Concepts
Innate Immune Responses
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Deep Dive: Innate Immune Responses
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Definition
Innate immune responses involve natural killer cells targeting infections and tumors, inflammation causing hot, swollen areas to fight irritants, and fever as a systemic response to pathogens. Fever creates an inhospitable environment for pathogens to slow their growth. Asymptomatic infections, where pathogens multiply without causing symptoms, highlight the body's silent defense mechanisms.
Topic Definition
Innate immune responses involve natural killer cells targeting infections and tumors, inflammation causing hot, swollen areas to fight irritants, and fever as a systemic response to pathogens. Fever creates an inhospitable environment for pathogens to slow their growth. Asymptomatic infections, where pathogens multiply without causing symptoms, highlight the body's silent defense mechanisms.
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