Question
Biology Question on Structural Organisation of Animals and plants
Histamine secreting cells are found in
A
connective tissues
B
lungs
C
muscular tissue
D
nervous tissue.
Answer
connective tissues
Explanation
Solution
Mast cells are the large cells with densely granular cytoplasm that is found in connective tissues. Their granules contain histamine which is a vasodilator, heparin which is an anticoagulant and serotonin which acts as a mediator o f inflammation and allergic reactions. Vasopressin is a hormone secreted by posterior pituitary gland. Calcitonin is a hormone secreted by thyroid gland. Melanin is a pigment produced by specialized epidermal cells called melanocytes. Relaxin is a hormone produced by the corpus luteum and placenta during the terminal stages of pregnancy.