Question

Mast cells:

a. Release histamine and other active contents from their granules.
b. Kill other cells infected with certain viruses.
c. Arise from the myeloid progenitor.
d. A & C
e. A, B & C

Answer 1

Mast cells release histamine from their granules and contribute to inflammatory and allergic responses; they also originate from the myeloid progenitor lineage, making option d (A & C) the correct answer to the question.

Step-by-step explanation:

The question concerns the functions and origins of mast cells within the immune system. Mast cells are known for their role in releasing histamine and other mediators during inflammatory and allergic responses.


Specifically, they:

• Release histamine and other active contents from their granules, contributing to inflammation and allergic reactions.
  
  
• Are derived from hematopoietic stem cells which means that they arise from the myeloid progenitor lineage.

Based on this information, the correct answer to the question is:

d. A & C - They release histamine and other active contents from their granules and arise from the myeloid progenitor.

It is noted that mast cells do not directly kill other cells infected with viruses, which means option B is not correct in the context of mast cell functions.