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The video tutorial explains the process of epicutaneous immunotherapy, where an allergen is applied to the skin to trigger an immune response. Langerhans cells, which are antigen-presenting cells in the stratum spinosum, transport the allergen to the immune system. Once inside, the allergen interacts with T lymphocytes, leading to the cloning of T cells to achieve tolerization.

What is the primary purpose of applying an allergen to the skin in epicutaneous immunotherapy?

• To remove dead skin cells

• To trigger an immune response

• To moisturize the skin

• To enhance skin color

Which cells are responsible for transporting the allergen to the immune system?

• Muscle cells

• Red blood cells

• Langerhans cells

• Nerve cells

Where are Langerhans cells most prominently found?

• In the dermis

• In the stratum spinosum

• In the epidermis

• In the hypodermis

What happens when the allergen makes contact with T lymphocytes?

• The T cells ignore the allergen

• The T cells clone themselves

• The T cells die

• The T cells change color

What is the ultimate goal of T cells cloning themselves in response to an allergen?

• To cause an allergic reaction

• To achieve tolerization

• To increase skin thickness

• To decrease immune response