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Module 1.3a

8. Axel woke up feeling alert. Which neurotransmitter 9. Which statement should Prim say to accurately discuss
impacted his alertness? myelin sheath?
a. Acetylcholine a. It supports, nourishes, and protects neurons.
b. Norepinephrine b. It contains the cell’s life-support center.
c. Substance P c. It blocks a neurotransmitter’s action.
d. Dopamine d. It enables vastly greater transmission speed as neural
impulses hop from one node to the next.

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Module 1.3b The Neuron and Neural

Firing: Substance Use

Disorders and Psychoactive

Drugs

LEARNING TARGETS

1.3-5 Explain substance use disorders.
1.3-6 Describe the depressants, and explain their effects.
1.3-7 Describe the stimulants, and explain their effects.
1.3-8 Describe the hallucinogens, and explain their effects.

s we have seen, your brain’s information processing occurs as neurons talk to
other neurons, by sending chemical messengers across the tiny synaptic gaps.
A When these neurotransmitter chemicals are supplemented or replaced by drugs,
strange things can happen.

The Neuron and Neural Firing: Substance Use Disorders and Psychoactive Drugs Module 1.3b 39

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