Page 1 of 79
Drug Recognition Expert NEW UPDATE
2026-2027 QUESTIONS AND DETAILED
SOLUTIONS
Question: What are the three parts of a neuron? - CORRECT ANSWER✔✔cell body, axon,
dendrites
Question: Which part of a nerve cell sends a neurotransmitter (chemical messenger)? -
CORRECT ANSWER✔✔The axon
Question: Which part of a nerve cell received a neurotransmitter (chemical messenger)? -
CORRECT ANSWER✔✔The dendrite
Question: What are the two basic classifications of nerves? - CORRECT ANSWER✔✔Sensory
(afferent) and motor (efferent) nerves
, Page 2 of 79
Question: What are the two sub-systems of motor nerves? - CORRECT ANSWER✔✔Voluntary
and autonomic
Question: What do voluntary motor nerves do? - CORRECT ANSWER✔✔Send messages to
striated muscles that we consciously control (skeletal muscles).
Question: What two sub-groups are motor nerves divided into? - CORRECT
ANSWER✔✔Voluntary and autonomic
Question: What are the functions of sympathetic motor nerves? - CORRECT ANSWER✔✔To
control the body's "fight or flight" responses, to elevate or escalate the body's response to a
potential hazard or threat.
Question: What are the functions of parasympathetic motor nerves? - CORRECT
ANSWER✔✔To produce relaxed and tranquil activities, to de-escalate the body's response to a
previous excitation
, Page 3 of 79
Question: Sympathomimetic drugs - CORRECT ANSWER✔✔Drugs that mimic the
neurotransmitter associated with sympathetic nerves (norepinephrine).
Question: Parasympathomimetic drugs - CORRECT ANSWER✔✔Drugs that mimic the
neurotransmitter associated with parasympathetic nerves.
Question: What are the functions of the neurotransmitter Acetylcholine? - CORRECT
ANSWER✔✔Plays a role in muscle control, learning and memory.
Question: What are the functions of the neurotransmitter Dopamine? - CORRECT
ANSWER✔✔Plays a role in mood control, necessary for mental concentration, alertness, high
energy, motivation, hunger regulation, and sex drive; functions in the brain's "reward pathway"
and makes you feel good; is an EXCITATORY neurotransmitter and acts like a "gas pedal" in a car.
Question: What are the functions of the neurotransmitter Serotonin? - CORRECT
ANSWER✔✔Vasoconstriction (narrowing of blood vessels), involved in sleep, wakefulness,
sensory perception; strongly associated with mood.
, Page 4 of 79
Question: What precursor to serotonin is used to treat insomnia? - CORRECT
ANSWER✔✔Tryptophan
Q:What is the definition of a drug? - CORRECT ANSWER✔✔Any substance that, when taken into
the human body, can impair the ability of the person to operate a vehicle safely.
Question: From where is the DRE definition of a drug derived? - CORRECT ANSWER✔✔The
1985 California Vehicle Code
Question: Approximately how many Americans abuse alcohol? - CORRECT ANSWER✔✔40-50
million
Question: Approximately how many Americans consider themselves heavy drinkers? -
CORRECT ANSWER✔✔16.3 million
Question: Over the past decade, approximately how many prescriptions were processed for
minor tranquilizers? - CORRECT ANSWER✔✔Estimated 60 million
Drug Recognition Expert NEW UPDATE
2026-2027 QUESTIONS AND DETAILED
SOLUTIONS
Question: What are the three parts of a neuron? - CORRECT ANSWER✔✔cell body, axon,
dendrites
Question: Which part of a nerve cell sends a neurotransmitter (chemical messenger)? -
CORRECT ANSWER✔✔The axon
Question: Which part of a nerve cell received a neurotransmitter (chemical messenger)? -
CORRECT ANSWER✔✔The dendrite
Question: What are the two basic classifications of nerves? - CORRECT ANSWER✔✔Sensory
(afferent) and motor (efferent) nerves
, Page 2 of 79
Question: What are the two sub-systems of motor nerves? - CORRECT ANSWER✔✔Voluntary
and autonomic
Question: What do voluntary motor nerves do? - CORRECT ANSWER✔✔Send messages to
striated muscles that we consciously control (skeletal muscles).
Question: What two sub-groups are motor nerves divided into? - CORRECT
ANSWER✔✔Voluntary and autonomic
Question: What are the functions of sympathetic motor nerves? - CORRECT ANSWER✔✔To
control the body's "fight or flight" responses, to elevate or escalate the body's response to a
potential hazard or threat.
Question: What are the functions of parasympathetic motor nerves? - CORRECT
ANSWER✔✔To produce relaxed and tranquil activities, to de-escalate the body's response to a
previous excitation
, Page 3 of 79
Question: Sympathomimetic drugs - CORRECT ANSWER✔✔Drugs that mimic the
neurotransmitter associated with sympathetic nerves (norepinephrine).
Question: Parasympathomimetic drugs - CORRECT ANSWER✔✔Drugs that mimic the
neurotransmitter associated with parasympathetic nerves.
Question: What are the functions of the neurotransmitter Acetylcholine? - CORRECT
ANSWER✔✔Plays a role in muscle control, learning and memory.
Question: What are the functions of the neurotransmitter Dopamine? - CORRECT
ANSWER✔✔Plays a role in mood control, necessary for mental concentration, alertness, high
energy, motivation, hunger regulation, and sex drive; functions in the brain's "reward pathway"
and makes you feel good; is an EXCITATORY neurotransmitter and acts like a "gas pedal" in a car.
Question: What are the functions of the neurotransmitter Serotonin? - CORRECT
ANSWER✔✔Vasoconstriction (narrowing of blood vessels), involved in sleep, wakefulness,
sensory perception; strongly associated with mood.
, Page 4 of 79
Question: What precursor to serotonin is used to treat insomnia? - CORRECT
ANSWER✔✔Tryptophan
Q:What is the definition of a drug? - CORRECT ANSWER✔✔Any substance that, when taken into
the human body, can impair the ability of the person to operate a vehicle safely.
Question: From where is the DRE definition of a drug derived? - CORRECT ANSWER✔✔The
1985 California Vehicle Code
Question: Approximately how many Americans abuse alcohol? - CORRECT ANSWER✔✔40-50
million
Question: Approximately how many Americans consider themselves heavy drinkers? -
CORRECT ANSWER✔✔16.3 million
Question: Over the past decade, approximately how many prescriptions were processed for
minor tranquilizers? - CORRECT ANSWER✔✔Estimated 60 million
