%$?# Allergies!

The video explores the causes and effects of allergies, focusing on pollen and the immune system's response. It discusses the role of histamine in allergy symptoms and the increasing prevalence of allergies in developed countries. The video also highlights research on potential solutions, including desensitization and the role of the microbiome. An interlude briefly covers astronomy and the Hubble telescope.

What is the main reason flowers are not the primary cause of seasonal allergies?

• They are pollinated by the wind.

• Their pollen is too heavy to become airborne.

• They do not produce pollen.

• They only bloom in winter.

Which type of antibody is primarily responsible for allergic reactions?

• IgM

• IgA

• IgG

• IgE

What chemical is released by mast cells during an allergic reaction?

• Serotonin

• Dopamine

• Histamine

• Adrenaline

What is one reason allergies are becoming more common in developed countries?

• Increased exposure to pollen

• Hygienic lifestyle

• Lack of medical facilities

• Genetic mutations

How can increasing exposure to an antigen over time help with allergies?

• It strengthens the immune system.

• It reduces the production of histamine.

• It desensitizes the body to the allergen.

• It increases antibody production.

What did a small study by the BBC find about people with allergies?

• They have a stronger immune system.

• They have more species of bacteria.

• They have fewer species of bacteria.

• They have a higher level of IgE.

What does the Hubble telescope image mentioned in the video cover?

• 2,000 square arc minutes

• 1,500 square arc minutes

• 500 square arc minutes

• 1,000 square arc minutes