News tagged with hormone

Related topics: breast cancer · women · plants · estrogen · protein

Testosterone beyond sex

When we think about sex hormones, notably estrogens and androgens, we usually associate them with sex, gender and body development. Like all hormones, they are chemical messengers, substances produced in one part of the body ...

Feb 23, 2016
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Insulin-secreting cells report on insulin resistance

Diabetes researchers at Sweden's Karolinska Institutet have developed a novel technique that makes it possible to monitor insulin resistance in a non-invasive manner over time in mice. The new method, presented in the journal ...

Feb 22, 2016
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Hormone

Hormones (from Greek ὁρμή - "impetus") are chemicals released by cells that affect cells in other parts of the body. Only a small amount of hormone is required to alter cell metabolism. It is essentially a chemical messenger that transports a signal from one cell to another. All multicellular organisms produce hormones; plant hormones are also called phytohormones. Hormones in animals are often transported in the blood. Cells respond to a hormone when they express a specific receptor for that hormone. The hormone binds to the receptor protein, resulting in the activation of a signal transduction mechanism that ultimately leads to cell type-specific responses.

Endocrine hormone molecules are secreted (released) directly into the bloodstream, while exocrine hormones (or ectohormones) are secreted directly into a duct, and from the duct they either flow into the bloodstream or they flow from cell to cell by diffusion in a process known as paracrine signalling.

This text uses material from Wikipedia, licensed under CC BY-SA

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