A transverse section of the adult spinal cord shows white matter in the periphery, gray matter inside, and a tiny central canal filled with CSF at its center. Surrounding the canal is a single layer of cells, the ependymal layer.
Cortisol is commonly referred to as the stress hormone.. The hormone is secreted by the adrenal glands and released into the bloodstream as a fight or flight response to stress. The highest quantities of cortisol are produced in the early morning hours and then production slowly tapers off throughout the day.
Cortisol is a steroid hormone produced by the zona fasciculata, the middle of three layers of the adrenal cortex located in the kidneys, and regulated by the pituitary gland in the brain. This hormone is important for the immune system, regulating blood pressure, the cardiovascular system, metabolism, and more.ow Cortisol Symptoms, Causes, and Treatments. March 16, 2014 by C. Paris. Cortisol, or hydrocortisone, is a steroid hormone (glucocorticoid) that is vital to the endocrine system released by the adrenal cortex to combat stress. Maintaining healthy levels of cortisol is essential to keeping in good health.