Mast cells secrete
hippurin
myoglobin
histamine
histamine
C.
histamine
Histamine is a protein, acting as a vasodilator (widening of blood vessels) in inflammatory and allergic reactions and also increases the permeability of small vessels. It is secreted from the mast cells which widely occur in the aerolar connective tissue.
Two other active substances secreted by mast cells are Heparin, a proteoglycan, which prevents coagulation of blood vessels and serotonin, a protein, which acts as vasoconstrictor to stop bleeding and to increase blood pressure.
In which disease does mosquito-transmitted pathogen cause chronic inflammation of lymphatic vessels?
Elephantiasis
Ascariasis
Amoebiasis
Ringworm disease
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
Autoimmune response
Cell-mediated immune response
Hormonal immune response
Hormonal immune response
HIV that causes AIDS, first starts destroying
B-lymphocytes
leucocytes
thrombocytes
thrombocytes
Which of the following is not an autoimmune disease?
Psoriasis
Rheumatoid arthritis
Vitiligo
Alzheimer's disease
