Which of the following statements concerning neurotransmitters is NOT true?
A) The various neurotransmitters are spread fairly evenly throughout the brain, and are believed to play approximately equal roles in different functions (such as exploratory behaviours).
B) The majority of research concerning neurotransmitters has examined dopamine, serotonin, norepinephrine and (more recently) gamma aminobutyric acid (GABA).
C) Neurotransmitters either inhibit or activate an impulse in the post-synaptic neuron.
D) Neurotransmitters carry their messages across a gap between neurons called a "synapse" or "synaptic cleft".
E) Neurotransmitters are the chemical substances that carry messages from one neuron to the next.

Question

Quizplus · Accepted Answer

The statement that the various neurotransmitters are spread fairly evenly throughout the brain and play approximately equal roles in different functions is not true. In fact, different neurotransmitters play different roles in various brain functions, and are not distributed evenly throughout the brain.

Which of the Following Statements Concerning Neurotransmitters Is NOT True