Human Health And Disease Question 22
Question: Mast cells secrete a protein which causes the dilation of blood vassels. The protein is:
Options:
A) Pyrogens
B) Histamine
C) Interferon
D) None of the above
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Mast cells are large cells with densely granular cytoplasm that are found in connective tissues.
Mast cell granules contain mediators of inflammation, such as histamine, serotonin, and various chemotactic factors (substances that attract white blood cells to the area of infection).
Histamine released from ruptured mast cells causes marked dilation of all the arteries so that a large amount of fluid is passed from the blood to the tissues and .there is a drastic fall in blood pressure.
BETA
