Background: An allergy is a disease in which the immune system makes an inflammatory response to a harmless antigen . Any antigen that causes an allergy is called an allergen. Allergens may be inhaled or ingested, or they may come into contact with the skin. Two common causes of allergies are shown in Figure below . Inhaling ragweed pollen may cause coughing and sneezing. Skin contact with oils in poison ivy may cause an itchy rash. Other common causes of allergies include dust mites, mold, animal dander, insect stings, latex, and certain food and medications. Symptoms of a common allergy such as pollen can include sneezing, a runny nose, nasal congestion and itchy, watery eyes.

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied more about inflammatory responses to harmless antigens?
Answer: Ben

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied less about inflammatory responses to harmless antigens?
Answer: Frank

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied less about skin allergies?
Answer: Frank

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied more about skin allergies?
Answer: Ben

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied more about inhaling ragweed pollen?
Answer: Ben

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied less about inhaling ragweed pollen?
Answer: Frank

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied less about skin contact with oils in poison ivy?
Answer: Frank

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied more about skin contact with oils in poison ivy?
Answer: Ben

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied more about allergies caused by animal dander?
Answer: Ben

Situation: Ben studied allergies ever since he experienced an allergic reaction to pollen. His brother Frank had no interest in the subject whatsoever, he was more interested in engineering.

Question: Which person studied less about allergies caused by animal dander?
Answer: Frank

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group experienced coughing?
Answer: Group Alpha

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group did not get any itchy rashes?
Answer: Group Alpha

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to dust mites?
Answer: Group Beta

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to mold?
Answer: Group Beta

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to animal dander?
Answer: Group Beta

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to insect stings?
Answer: Group Beta

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to latex?
Answer: Group Beta

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to certain foods?
Answer: Group Beta

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to certain medications?
Answer: Group Beta

Situation: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens.

Question: Which group had some people that were exposed to pollen?
Answer: Group Beta