Neural biology explains ejaculation

How does the body know it has had an ejaculation? And why does it care? Anatomically, it is more complex than it seems, says the University of Cincinnati scientist who last year identified the spinal cord cells that control ejaculation in rats and the neural pathway by which signals travel between the body’s sexual organs to the brain.

Rat study finds prenatal exposure to nicotine increases risk of apnea

University of Arizona researchers report new evidence that exposure to nicotine in the developing rat fetus enhances the function of GABAa receptors, a key component of brain cells that control breathing rhythm. The increased functional capacity of the GABAa receptors may make these newborns more likely to have episodes of apnea, in which breathing simply stops.

Adolescent girls who consume more calcium weigh less

The first large study to look at total calcium consumption in adolescents found that girls who consumed more calcium weighed less and had lower body fat. The findings were presented at the Experimental Biology 2003 meeting in San Diego, as part of the American Society for Nutritional Sciences program.