Related topics: women , estrogen
Hormone
hideHormones (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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News tagged with hormone
Research identifies gene with likely role in premenstrual disorder
15 hours ago |
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Scientists have identified a gene they say is a strong candidate for involvement in premenstrual dysphoric disorder (PMDD) and other maladies associated with the natural flux in hormones during the menstrual cycle. In a paper ...
Estrogen-only HRT may increase risk of asthma after menopause
Feb 08, 2010 |
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Oestrogen-only hormone replacement therapy (HRT) may increase the risk of developing asthma after the menopause, suggests a large scale study published ahead of print in the journal Thorax.
If you want to lose weight, find a mountain retreat
Feb 05, 2010 |
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(PhysOrg.com) -- A new study has found the secret to effortless weight loss: spend some time at high altitude. Even a week on a mountain retreat can produce weight loss in sedentary people eating as much as ...
Researchers may have uncovered the mechanism by which progesterone prevents preterm birth
Feb 05, 2010 |
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Researchers at Yale School of Medicine believe they may have discovered how the hormone progesterone acts to prevent preterm birth.
Moss helps chart the conquest of land by plants (w/ Video)
Feb 04, 2010 |
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(PhysOrg.com) -- Recent work at Washington University in St. Louis sheds light on one of the most important events in earth-history, the conquest of land by plants 480 million years ago.
First discovery of the female sex hormone progesterone in a plant
Feb 04, 2010 |
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In a finding that overturns conventional wisdom, scientists are reporting the first discovery of the female sex hormone progesterone in a plant. Until now, scientists thought that only animals could make progesterone. ...
New method for treating stress
Feb 03, 2010 |
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(PhysOrg.com) -- A new analysis of the way the body responds to stress suggests that administering constant high levels of drugs is not the best way to treat this condition. A better way might be to design drugs that follow ...
New insights into breast-feeding hormone
Medicine & Health / Neuroscience
Jan 28, 2010 |
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(PhysOrg.com) -- A mechanism for regulating the hormone prolactin has newly been revealed by scientists at Karolinska Institutet, Sweden. The results are to be published in the scientific journal Neuron, and may be significant ...
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Scientists discover how certain hormones control aspects of root branching in plants
Jan 27, 2010 |
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(PhysOrg.com) -- Roots are the most underestimated parts of a plant, even though they are crucial for water and nutrient uptake and consequently growth. In a world of changing water availability and an ever-increasing ...
Pomegranate extract stimulates uterine contractions
Jan 27, 2010 |
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a steroid that can inhibit the absorption of cholesterol in the intestine - as the main constituent of pomegranate seed extract. The research suggests that pomegranate extract could be used as a natural stimulant to encourage ...
Human growth hormone: Not a life extender after all?
Jan 26, 2010 |
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People profoundly deficient in human growth hormone (HGH) due to a genetic mutation appear to live just as long as people who make normal amounts of the hormone, a new study shows. The findings suggest that HGH may not be ...
Studies shed new light on early transmembrane signaling
Jan 25, 2010 |
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Two new studies by researchers at the University of Washington further our understanding of the molecular steps in the PLC cascade, a G protein-coupled receptor signaling mechanism that underlies a wide variety of cellular ...
Study confirms prostate cancer is treated differently at county vs. private hospitals
Jan 25, 2010 |
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Researchers at Moores Cancer Center at the University of California, San Diego and colleagues have found that prostate cancer treatments varied significantly between county hospitals and private providers. Patients treated ...
Endometrial Cancer Most Common, Least Talked About Gynecologic Cancer
Jan 21, 2010 |
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(PhysOrg.com) -- One of the most common cancers affecting women in the United States has a precancerous state and obvious warning signs, yet almost 8,000 women die from the disease annually.
Estrogen in the fight against schizophrenia
Jan 20, 2010 |
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Many American women are prescribed estrogen to combat the negative effects of menopause, such as bone loss and mood swings. Now, new evidence from a Tel Aviv University study suggests that hormone replacement therapy might ...
