Adenosiinivälitteisesti

Adenosiinivälitteisesti describes a process or interaction that is mediated or facilitated by adenosine. Adenosine is a naturally occurring nucleoside composed of adenine and ribose. In the human body, adenosine plays a crucial role in various physiological processes. It acts as a neuromodulator in the central nervous system, influencing sleep-wake cycles, anxiety, and the release of other neurotransmitters.

When something is described as occurring "adenosiinivälitteisesti," it means that adenosine is the key molecule or signaling pathway involved in that event. For example, the vasodilation (widening of blood vessels) that occurs during increased metabolic activity in tissues is often adenosine-mediated. As cells work harder, they consume more oxygen and produce more adenosine, which then diffuses into the bloodstream and binds to receptors on the blood vessel walls, causing them to relax and increase blood flow to deliver more oxygen and nutrients.

Another significant area where adenosine acts is in the heart. Adenosine can slow the heart rate by acting on the sinoatrial and atrioventricular nodes. This property is utilized in medical procedures, such as intravenous administration of adenosine to help diagnose or treat certain types of supraventricular tachycardia (a rapid heart rhythm). The effects of caffeine, a common stimulant, are partly due to its ability to block adenosine receptors, thus preventing adenosine from exerting its inhibitory effects and leading to increased alertness. Therefore, "adenosiinivälitteisesti" points to the involvement of this versatile molecule in a specific biological function or pharmacological action.