Certain mental problems are thought to be caused by not having enough neurotransmitters. Why would a lack of neurotransmitters cause problems?
A. Neurons would not be able to receive sensory messages.
B. Neurotransmitters send signals from neuron to neuron.
C. Neurons would not be able to grow longer.
D. Neurons would not be able to move to new areas.

B. Neurotransmitters send signals from neuron to neuron.

Explanation:

Lack of neurotransmitters may cause problems because neurotransmitters send signals from neuron to neuron.

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