Oncology & Cancer

Researchers discover key protein in endometrial cancer growth

The hormone estrogen plays many critical roles in men and women, in both healthy tissues and in cancer. In breast and gynecologic cancers, estrogen sends signals to tumors instructing the cancer cells to grow out of control. ...

Cardiology

Caring for your heart is critical during the winter months

We may be starting the new year with mild temperatures, but we still have a long stretch of winter months ahead. As the temperatures inevitably turn more seasonable, it's important to keep up with your health, especially ...

Oncology & Cancer

Most men do not regret their choices for prostate cancer surgery

Men with localized prostate cancer are faced with deciding among a range of options for treatment—including a choice between robot-assisted versus conventional prostatectomy. A new follow-up study in The Journal of Urology ...

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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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