Dopamine Is Not Administered Directly to the Patient During the Treatment

Multiple Choice

Dopamine is not administered directly to the patient during the treatment of Parkinson's disease because:

A) dopamine is not a therapeutic consideration; only acetylcholine replacement therapy is.
B) dopamine cannot cross the blood-brain barrier.
C) the half-life of dopamine is too short to enable pharmacologic effects in the brain.
D) the type of dopamine necessary in the brain is different from the type administered intravenously.