The Endocannabinoid System: A Beginner’s Guide

Article by Leaf Science

The Endocannabinoid System: A Beginner’s Guide. Learn more about the endocannabinoid system and how it affects your health.

The endocannabinoid system is a biological system which plays many important roles in the human body. It is also responsible for the physical and psychological effects of cannabis.

Scientists first discovered the system while trying to understand the effects of cannabis, and named it the endocannabinoid system for this reason.

Endo stands for endogenous, which means originating within the body. Cannabinoidrefers to the group of compounds that activate this system.

The endocannabinoid system is a major target of medical research because of its widespread effects and therapeutic potential. While scientists have sorted out the basics of this fascinating system, much more remains to be uncovered.

What are Cannabinoids?

Cannabinoids are the chemical messengers for the endocannabinoid system. While many different cannabinoids exist, they all fall under two categories: endogenous or exogenous.

Endogenous means originating inside the body. Also known as endocannabinoids, these compounds are produced naturally by the human body. They interact with cannabinoid receptors to regulate basic functions including mood, memory, appetite, pain, sleep, and many more.

Exogenous means originating outside the body. The cannabinoids found in marijuana, such as tetrahydrocannabinol (THC) and cannabidiol (CBD), are considered exogenous. When consumed, they also interact with cannabinoid receptors to produce physical and psychological effects in the body.

What are Cannabinoid Receptors?

You may be wondering, what exactly are receptors? As their name suggests, receptors are message receivers. Messages come in the form of chemical messengers binding to the receptor. These messages produce a characteristic effect within the body.

The endocannabinoid system has two receptors: CB1 and CB2. Each receptor responds to different cannabinoids, but some cannabinoids can interact with both.

The distribution of CB1 and CB2 receptors within the body and brain explains why cannabinoids have certain effects.

CB1 receptors are found throughout the body, but are mostly present in the brain and spinal cord. They are concentrated in brain regions associated with the behaviors they influence.

For example, there are CB1 receptors in the hypothalamus, which is involved with appetite regulation, and the amygdala, which plays a role in memory and emotional processing. CB1 receptors are also found in nerve endings where they act to reduce sensations of pain.

CB2 receptors tend to be found in the peripheral nervous system. They are especially concentrated in immune cells. When CB2 receptors are activated, they work to reduce inflammation. Inflammation is an immune response which is believed to play a role in many diseases and conditions.

With respect to the cannabinoids found in cannabis, researchers have found that THC binds to both CB1 and CB2 receptors, activating them just like an endocannabinoid.

CBD does not bind directly to cannabinoid receptors. Instead, CBD works by inhibiting an enzyme called FAAH, which is responsible for the breakdown of anandamide — the most important endocannabinoid in the body. When FAAH is inhibited, it cannot break down anandamide at its normal rate. This leads to a buildup of anandamide in the brain.

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