News tagged with hormone

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

Lack of thyroid hormone blocks hearing development

Fatigue, weight gain, chills, hair loss, anxiety, excessive perspiration—these symptoms are a few of the signs that the thyroid gland, which regulates the body's heart rate and plays a crucial role in its ...

Sep 22, 2014
popularity 5 / 5 (21) | comments 2

A potential breakthrough on liver cancer

In the battle of humans versus disease, the latter usually gets the upper hand in the end. For patients with terminal diseases, the pace of biomedical research can seem glacial. It takes years—if not decades—to ...

Sep 08, 2014
popularity 4.3 / 5 (20) | comments 0

Modulating your own immune response

With the help of simple techniques like breathing exercises, meditation and repeated exposure to cold, you can activate the autonomic nervous system and inhibit the response of your immune system. Researchers ...

May 06, 2014
popularity 4.4 / 5 (9) | comments 0

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.

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