One type of photochemical reaction is the dissociation of a molecule into two fragments. Since it is the electrons that provide the bonding forces that hold atoms together into molecules, if the distribution of electrons within a molecule changes drastically, the bonding forces may also change.
Trade names: IntropinÂ®, DopastatÂ®, RevimineÂ®. Mechanistic Class: sympathomimetic, dopaminergic and Î² 1 -adrenergic agonist. Therapeutic Class: vasopressor. Mechanism of action: Dopamine is a natural catecholamine neurotransmitter and is the biological precursor to norepinephrine.It increases heart rate, cardiac contractility and blood pressure by multiple mechanisms. Dopamine causes norepinephrine release from sympathetic nerve endings.echanism of action: Dopamine is a natural catecholamine neurotransmitter and is the biological precursor to norepinephrine. It increases heart rate, cardiac contractility and blood pressure by multiple mechanisms.
Dopamine is a signaling chemical--a neurotransmitter--that is used by various cells in the body to communicate with one another.The primary places in the body where dopamine is used are in the central nervous system, peripheral nervous system and in the blood vessels.he mainstay of dopamine blockers is treatment of schizophrenia. Anti-psychotic medications are the largest group of dopamine blockers on the market today. Clozapine (sold as Clozaril, Leponex) is a commonly prescribed anti-psychotic medication to treat this condition.