Question
Biology Question on Animal Tissues
Mast cells of connective tissue contain
A
vasopressin and relaxin
B
heparin and histamine
C
heparin and calcitonin
D
serotonin and melanin.
Answer
heparin and histamine
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 of 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.