Mon Prof Augmenté
Pollen and the Allergy Response
Age 11 · Biology
Pollen is usually harmless. In an allergy, the body treats it like an invader and releases histamine.
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Age 11: open this week
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In the picture
- A round pollen grain drifting in the airway
- A Y-shaped antibody gripping the pollen grain
- A large cell that releases chemical droplets
- A histamine droplet moving toward a nearby vessel
Examples
- Sneezing when pollen counts are high
- Itchy, watery eyes near blooming trees
Key takeaways
- The body can mistake harmless pollen for a threat.
- Histamine causes sneezing, itching, and a runny nose.
Quiz: Pollen and the Allergy Response (Age 11)
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In an allergy, what does the body mistake harmless pollen for?
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Which chemical does the body release during an allergic response to pollen?
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What does histamine cause during an allergic reaction?
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