Researched
Hormones
Bayliss and Starling showed in 1902 that a gut chemical travels in the blood to trigger the pancreas; in 1905 Starling named such messengers hormones.
Open in the interactive tree →Secretin made the pancreas release digestive juice even with its nerves cut, which broke the rule that only nerves coordinate organs. Blood-borne messengers were soon found for the adrenal glands, thyroid, ovaries and pancreas (insulin).
Prerequisites
Unlocks
- Insulin1921Insulin was found as the pancreas's blood-borne messenger, the hormone idea applied to diabetes
- Contraceptive pill1960
- In vitro fertilisation1978
- GLP-1 weight-loss drugs2021GLP-1 drugs copy a gut hormone that signals fullness and raises insulin