Thousands of microvilli form a structure called the brush border that is found on the apical surface of some epithelial cells, such as the small intestines. (Microvilli should not be confused with intestinal villi, which are made of many cells.
Autism spectrum disorder has no single known cause. Given the complexity of the disorder, and the fact that symptoms and severity vary, there are probably many causes. Both genetics and environment may play a role. 1  Genetic problems. 2  Several different genes appear to be involved in autism spectrum disorder.
A New Possible Cause of Autism. New research is beginning to show that toxins and oxidative stress contribute to autism. These toxins and oxidative stress damage brain cells and upset the delicate balance of neurotransmitters in the brain, which can cause neurological damage, and in extreme cases, autism.o answer this question, researchers from Stanford University decided to test the effects of N-acetyl cysteine supplementation on autism symptoms in children. N-acetyl cysteine (NAC) is a precursor to glutathione that increases the bodyâs production of this vital antioxidant.