ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Human growth hormone. Crystals of human growth hormone, polarised light micrograph. HGH is produced in the anterior pituitary gland of the brain. It binds to specific receptors on cells in the body to stimulate growth, especially in childhood. It is also involved in strengthening bone, increasing muscle mass, reducing glucose uptake by the liver and promoting the breakdown of body fat. Magnification: 33x at 4x5 inch size.
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