Answer:
Mast Cells
Explanation:
Mast cells release histamine in the blood stream, when they detect a substance that triggers an allergic reaction, also called an allergen.
The answer would most likely be D) W, V, Y, Z, X.
I'd have to say either 1 or 3. I would choose number 3.
Inflammation of the urinary tract
The answer is:
the change in red blood cell volume is principally due to the movement of WATER.
