The first hormone to be discovered was:
Correct answer: A. Secretin
- A. Secretin
- B. Testosterone
- C. Insulin
- D. Thyroxin
Explanation
Wm. M. Bayliss and Ernest H. Starling discovered secretin, the first hormone, in 1902. They discovered this hormone when they were studying pancreatic secretion. Secretin hormone stimulates the pancreas to secrete digestive fluid.
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About Chemical Coordination and Hormones
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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