Question

question 4 of 10
why would a lack of neurotransmitters change the function of the brain?
a. neurons in the spinal cord are made of neurotransmitters.
b. neurotransmitters are the only chemicals that can enter the myelin sheath.
c. neurotransmitters connect the axon to the nucleus.
d. signals travel from neuron to neuron through neurotransmitters.

Explanation:

Neurotransmitters are chemicals that transmit signals between neurons. A lack of them would disrupt this signal - transmission process, thus changing brain function. Neurons are not made of neurotransmitters, neurotransmitters are not the only chemicals that can enter the myelin sheath, and they do not connect the axon to the nucleus.

Answer:

D. Signals travel from neuron to neuron through neurotransmitters.