Podcast
Questions and Answers
What role do macrophages and neutrophils play in innate immunity?
What role do macrophages and neutrophils play in innate immunity?
- They identify and engulf invading pathogens. (correct)
- They generate fever to inhibit pathogen growth.
- They produce antibodies to target specific pathogens.
- They act as physical barriers to prevent microbial entry.
How does inflammation contribute to innate immunity?
How does inflammation contribute to innate immunity?
- By increasing physical barriers against pathogen entry.
- By causing systemic vasodilation to lower blood pressure.
- By promoting the production of antibodies.
- By causing redness, heat, and swelling to isolate harmful agents. (correct)
Which statement accurately describes the complement system?
Which statement accurately describes the complement system?
- It is primarily responsible for producing fever.
- It involves only white blood cells in targeting pathogens.
- It is a specific immune response targeting particular bacteria.
- It consists of proteins that work together to kill bacteria. (correct)
What is a key feature of innate immunity?
What is a key feature of innate immunity?
What is the primary function of stomach acid in innate immunity?
What is the primary function of stomach acid in innate immunity?
Flashcards
Innate Immunity
Innate Immunity
Body's first line of defense, non-specific, targeting all pathogens.
Physical Barriers
Physical Barriers
Skin and mucous membranes preventing pathogen entry.
White Blood Cells
White Blood Cells
Cells like macrophages and neutrophils that engulf pathogens.
Inflammation
Inflammation
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Complement System
Complement System
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Study Notes
Innate Immunity Overview
- Innate immunity is the body's initial defense against infections.
- Physical barriers (skin, mucous membranes) prevent pathogen entry.
- Chemical barriers (stomach acid, saliva enzymes) destroy pathogens.
- White blood cells (macrophages, neutrophils) identify and engulf invaders.
- Inflammation (redness, heat, swelling) isolates and eliminates pathogens.
- Fever inhibits pathogen growth.
- Complement system proteins kill bacteria.
- Innate immunity is non-specific, targeting all pathogens.
- Response time is fast (minutes to hours).
- Innate immunity protects against daily threats and responds immediately.
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