NU 670 UNIT 2 EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST
UPDATE 2026
Nervous System - Answers The system that includes the peripheral and central
nervous system.
Somatic Nervous System - Answers Part of CNS that controls movement of skeletal
muscle.
Sympathetic Nervous System - Answers Excitatory system responsible for fight or
flight responses.
Parasympathetic Nervous System - Answers Calming system that promotes rest and
digest functions.
Autonomic Nervous System - Answers Part of the CNS that controls self-regulating
actions and internal organs.
Glial Cells - Answers Structures that form the myelin sheath around neurons.
Dendrites - Answers Fingers that receive information to the cell body.
Axon - Answers Carries information away from the cell body.
Synapse - Answers Connection site for communication between neurons.
Action Potential - Answers An electrical signal that travels along the neuron.
Depolarization - Answers Excitatory response where calcium and sodium ions flow
into the cell.
Repolarization - Answers Resting period where potassium leaves the cell and
chloride enters.
Neurotransmitters - Answers Chemicals that transmit signals across a synapse.
Criteria for Neurotransmitters - Answers Must be present in neuroterminal, released
in sufficient quantities, and metabolized at the synapse.
Dopamine (DA) - Answers A neurotransmitter with a precursor of tyrosine, involved
in cognition and motor control.
Norepinephrine (NE) - Answers A neurotransmitter with a precursor of tyrosine,
involved in mood and anxiety.
Epinephrine (E) - Answers A neurotransmitter produced by the adrenal glands,
involved in fight or flight response.
Serotonin (5HT) - Answers A neurotransmitter with a precursor of tryptophan,
involved in mood and anxiety.
UPDATE 2026
Nervous System - Answers The system that includes the peripheral and central
nervous system.
Somatic Nervous System - Answers Part of CNS that controls movement of skeletal
muscle.
Sympathetic Nervous System - Answers Excitatory system responsible for fight or
flight responses.
Parasympathetic Nervous System - Answers Calming system that promotes rest and
digest functions.
Autonomic Nervous System - Answers Part of the CNS that controls self-regulating
actions and internal organs.
Glial Cells - Answers Structures that form the myelin sheath around neurons.
Dendrites - Answers Fingers that receive information to the cell body.
Axon - Answers Carries information away from the cell body.
Synapse - Answers Connection site for communication between neurons.
Action Potential - Answers An electrical signal that travels along the neuron.
Depolarization - Answers Excitatory response where calcium and sodium ions flow
into the cell.
Repolarization - Answers Resting period where potassium leaves the cell and
chloride enters.
Neurotransmitters - Answers Chemicals that transmit signals across a synapse.
Criteria for Neurotransmitters - Answers Must be present in neuroterminal, released
in sufficient quantities, and metabolized at the synapse.
Dopamine (DA) - Answers A neurotransmitter with a precursor of tyrosine, involved
in cognition and motor control.
Norepinephrine (NE) - Answers A neurotransmitter with a precursor of tyrosine,
involved in mood and anxiety.
Epinephrine (E) - Answers A neurotransmitter produced by the adrenal glands,
involved in fight or flight response.
Serotonin (5HT) - Answers A neurotransmitter with a precursor of tryptophan,
involved in mood and anxiety.
