Answer
Dopamine is an essential neurotransmitter to the brain, as it plays an integral role in controlling muscle movement. Dopamine cannot cross the blood-brain barrier, however. As a result, individuals whose bodies do not produce enough dopamine will be given L-dopa, as this medication can cross the blood-brain barrier. Once in the brain, it is converted into the dopamine that the brain and body needs.
Work Step by Step
Dopamine is an essential neurotransmitter to the brain, as it plays an integral role in controlling muscle movement. Dopamine cannot cross the blood-brain barrier, however. As a result, individuals whose bodies do not produce enough dopamine will be given L-dopa, as this medication can cross the blood-brain barrier. Once in the brain, it is converted into the dopamine that the brain and body needs.