Biology and sexual orientation INAH3 weight for the heterosexual male brains was significantly larger than for the heterosexual female brains, while the results for the gay male group were between those of the other two groups but not quite significantly different from either. The neuron count also found a male-female difference in INAH3, but found no trend related to sexual orientation. A 2010 study, Garcia-Falgueras and Swaab asserted that "the fetal brain develops during the intrauterine period in the male direction through a direct action of testosterone on the developing nerve cells, or in the female direction through the absence of this hormone surge.
Adrenocortical hormone and increased blood potassium levels caused by a deficiency of aldosterone. These electrolyte imbalances induce nerve and muscle issues. Other symptoms include fatigue, salt cravings, weight loss, and increased skin pigmentation. Increased skin pigmentation is caused by a deficiency of the adrenocortical hormone hydrocortisone. Its normal behavior would be as negative feedback at the pituitary gland, stimulating the pituitary gland to decrease secretion of corticotropin. Because hydrocortisone is not able to be produced in Addison’s disease, the pituitary gland continues to secrete corticotropin which binds to the receptor for melanocyte-stimulating hormone. It then causes melanocytes to produce more pigment, thus