Question

t cells are activated by macrophages and activated b cells, which fulfill this role by acting as antigen presenting cells (apcs)
true
false
question 2
1 pts
the cells of innate immunity that activate the lymphocytes of adaptive immunity are the:
mast cells and neutrophils
eosinophils and monocytes
basophils and eosinophils
macrophages and langerhans cells
question 3
1 pts
in specific (adaptive) immunity, the process of complement fixation is activated by:
macrophages alone
foreign antigens alone
macrophages and plasma cells
antigen - antibody complexes

Explanation:

• Question 1: Macrophages and activated B - cells can act as antigen - presenting cells (APCs) to activate T - cells.
• Question 2: Macrophages and Langerhans cells (a type of dendritic cell in the skin) from innate immunity can activate lymphocytes of adaptive immunity.
• Question 3: In specific (adaptive) immunity, the process of complement fixation is activated by antigen - antibody complexes.

Answer:

• Question 1: True
• Question 2: macrophages and Langerhans cells
• Question 3: antigen - antibody complexes