Question

question: what do mast cells release that can cause irritation or severe, even fatal anaphylactic shock? answer options: select one of four antigens cilia interferons histamines

Explanation:

To solve this, we analyze each option:

• Antigens are foreign substances that trigger an immune response, not released by mast cells to cause anaphylaxis.
• Cilia are hair - like structures for movement/filtration, not related to mast cell - mediated reactions.
• Interferons are involved in antiviral responses, not in anaphylactic shock.
• Histamines are released by mast cells during allergic reactions, causing symptoms like irritation and anaphylactic shock.

Answer:

D. Histamines