postganglionicsympatiske

Postganglionicsympatiske refers to the sympathetic nervous system's postganglionic fibers, which are the nerve fibers that extend from the sympathetic ganglia to the target organs. These fibers are responsible for the "fight or flight" response, which is a physiological reaction to stress or danger. The postganglionic sympathetic fibers release the neurotransmitter norepinephrine, which binds to adrenergic receptors on the target organs, causing various effects such as increased heart rate, dilated pupils, and increased blood pressure. The postganglionic sympathetic fibers are part of the autonomic nervous system, which controls involuntary bodily functions. The sympathetic nervous system is one of the two main divisions of the autonomic nervous system, the other being the parasympathetic nervous system. The postganglionic sympathetic fibers are innervated by the preganglionic sympathetic fibers, which originate from the intermediolateral cell column of the spinal cord. The postganglionic sympathetic fibers are also involved in the regulation of various physiological processes, such as digestion, metabolism, and thermoregulation. The postganglionic sympathetic fibers are typically found in the adrenal medulla, where they release the hormone epinephrine, which is also known as adrenaline. The postganglionic sympathetic fibers are also involved in the regulation of the body's response to injury or illness, such as inflammation and pain.