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 (20) | 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

20 years of leptin – the obesity related hormone

2014 marks the 20th anniversary of the discovery of leptin – the hormone that tells our brains when we've eaten enough and the first reported genetic basis for obesity. The discovery will be celebrated ...

Sep 25, 2014
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Is football stress hazardous to fans' health?

The excitement of football, and even the activities and feelings of anticipation leading up to games, can be unhealthy in ways many do not realize, according to Jody Gilchrist, a nurse practitioner at the ...

Sep 08, 2014
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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.

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