Yes, they're called "endorphins". There is currently much research going on to see if they can be voluntarily brought to bear by people who suffer from chronic pain, as one example.
dopamine and serotonin are some brain homones
Substantial nigra
Many things can deprive the brain of oxygen. If the blood flow to the head is reduced or blocked, if your hemoglobin is very low, high altitudes, using opiates, and others.
Pituitary is not supposed to be the part of the brain. It lies in pituitary fossa. It is connected to the brain via small stalk. It produce large number of hormones.
The pineal gland is at or very near the center of the brain and it produces serotonin.
True
Definitely not. Melatonin does not contain a narcotic. It is strictly used to boost your melatonin levels to help produce sleep.
Endorphins, the natural chemical in your brain that produces pain relief. It also effects the dopamine levels of the brain, which control how happy and euphoric you feel. If you take enough opiates over a long period of time, the brain stops naturally producing these two chemicals, because it gets used to the boost the opiates given to it. That's why it's so difficult to come off of opiates. You feel depressed and in pain, because your brain is not used to producing these chemicals on their own anymore. It takes time for the brain to heal and to eventually produce these chemicals normally again.
A physical addiction occurs as a chemical interferes with the balance of the brain's chemistry. In a natural state, the pleasure center of our brains are stimulated by naturally occurring opiates within the body. The result of the stimulation is a sense of physical and psychological pleasure produced by the brain. Drugs, however, push aside the natural opiates and stimulate the pleasure center, at a more intense rate than natural opiates. The brain stops producing the natural opiates, and anticipates the outside drug, this starts a physical obligation by the user to provide a drug of choice. A physical addiction can end in seven days without taking the drug before your body restarts producing the natural opiates, but a psychological addiction lasts a lifetime. Check out the Related Questions for more information on Psychological addictions.
Opiates block the pain signals to the brain - therefore the the brain has reduced sensitivity to the pain.
You mean dopamine. Opiates cause your brain to release your dopamine supply which is what causes the euphoria.
The brain does not produce ephedrine, as it is not a chemical the body produces.
there are places on certain nerves that reconginze opiates
No Suboxone will not block the use of opiates on a drug test. It will still show up, but you won't get the feeling from the opiates. You will however get into trouble if you are being prescribed Suboxone.
there are places on certain nerve cells that recongnize opiates
dopamine and serotonin are some brain homones
Stimulants and depressants have opposite effects on the brain. Stimulants activate the central nervous system, while depressants (as their name implies) depress it.