Tetrahydrocannabinol is often referred to as THC and is what’s responsible for giving you that “high.”
THC finds its way to cannabinoid receptors through your bloodstream, after being inhaled. These receptors are located in your brain and control memory, mood, concentration, motor skills, and time perception.
Then the receptors in your brain receive THC, the functions that they control get scrambled and overactive, causing dopamine to be released, which caused you to feel groovy.
When eating your marijuana, it can be unpredictable due to the fact that it can take longer to reach your blood stream and be harder to regulate. You may continue eating and not feeling high for an hour and then when it hits, you realize you’ve eaten too much.
Smoking weed causes the heart rate to increase and it can last as long as three hours after you’ve smoked. Increases in heart rate can vary from a 20% increase to 100% increase.
So why do you get the munchies when you’re high? Remember those receptors responsible for mood, motor skills, and more? Well, they are also responsible for hunger and energy intake, therefor triggering food cravings.