i know i can just google this but i'm sure some of you may have your own thoughts...specially to those who actually smoke the plant.
and i know there's quiet a lot of ways to intake the THC to the human body but i am just looking for self definitive answers from you guys.
as far as i remember, my chemistry teacher back in high school told me that something about THC you get from the cannabis plant can fit into receptors in the brain.
and something about it produce or block some of the dopamine in the brain or produce it's own dopamine....and something about cloning???

my other question is, what if the THC that attached to those receptors can stay there longer or permanently attached there...what would happened to the human brain?
does the effect can prolong?

No they are not there permanently and yes they can have a lasting effect on dopamine in the brain.

As your body becomes more accustomed to the drug being there, it will have to release more dopamine to achieve the desired results.

Hence tolerance.