Regarding Neurotransmission, Which of the Following Statements Is FALSE

Regarding neurotransmission, which of the following statements is FALSE?

A) The nervous system depends on a balance between neural excitation and inhibition to function effectively.
B) Excitatory effects make an action potential more likely to occur, whereas inhibitory effects make action potentials less likely to occur.
C) All neurotransmitters have both excitatory and inhibitory effects.
D) Neurotransmitters that do not dock at receptor sites are decomposed in the synaptic gap or are reabsorbed by the transmitting neuron.
E) Neurotransmitters carry messages controlling all aspects of human activity, from the biological to the mental to the emotional.