WGU D574 Neuropsychology | Pre-Assessment |
199 Actual Questions and Answers Latest
Updated 2025/2026 (Graded A+)
Neurons - Correct Answer-Specialized cells for transmitting electrical signals
in the nervous system.
Sensory neurons - Correct Answer-Transmit sensory information from sensory
receptors to the brain and spinal cord.
Motor neurons - Correct Answer-Carry commands from the brain and spinal
cord to muscles and glands.
Interneurons - Correct Answer-Communicate between sensory and motor
neurons within the brain and spinal cord.
Glial Cells - Correct Answer-Support neurons by providing structural support,
nutrients, insulation, and waste removal.
Astrocytes - Correct Answer-Provide support and nutrition to neurons,
maintain the blood-brain barrier.
Oligodendrocytes - Correct Answer-Form myelin in the central nervous system
(CNS).
Schwann cells - Correct Answer-Form myelin in the peripheral nervous system
(PNS).
Microglia - Correct Answer-Act as the immune system of the brain, cleaning
up dead neurons and pathogens.
,Central Nervous System (CNS) - Correct Answer-Includes the brain and spinal
cord. It processes sensory information and coordinates body functions.
Peripheral Nervous System (PNS) - Correct Answer-Composed of sensory and
motor neurons outside the CNS.
Somatic nervous system - Correct Answer-Controls voluntary movements of
skeletal muscles.
Autonomic nervous system - Correct Answer-Controls involuntary functions
(heart rate, digestion) and is divided into sympathetic and parasympathetic
systems.
Lesion studies - Correct Answer-Involves damaging specific areas of the brain
to observe changes in behavior.
Electroencephalogram (EEG) - Correct Answer-Measures electrical activity in
the brain by placing electrodes on the scalp.
Functional MRI (fMRI) - Correct Answer-Measures brain activity by detecting
blood flow changes, indicating areas of the brain that are active during specific
tasks.
Positron Emission Tomography (PET) - Correct Answer-Uses radioactive
substances to visualize active areas of the brain.
Single-cell recordings - Correct Answer-Measures the electrical activity of a
single neuron to study brain function in greater detail.
Cell body (soma) - Correct Answer-Contains the nucleus and organelles.
Dendrites - Correct Answer-Receive signals from other neurons.
Axon - Correct Answer-Transmits electrical impulses away from the cell body.
, Myelin sheath - Correct Answer-Insulates the axon, speeding up signal
transmission.
Axon terminals - Correct Answer-Release neurotransmitters to communicate
with other neurons.
Resting potential - Correct Answer-The neuron's membrane potential at rest is
negative (~-70 mV) due to ion distribution.
Depolarization - Correct Answer-When a neuron receives a stimulus, sodium
(Na⁺) channels open, and Na⁺ ions rush in, making the inside of the cell more
positive.
Repolarization - Correct Answer-Potassium (K⁺) channels open, and K⁺ ions
exit the neuron, returning the membrane potential to negative.
Hyperpolarization - Correct Answer-The membrane potential becomes more
negative than the resting potential.
Refractory period - Correct Answer-The neuron cannot fire another action
potential during this period.
Synapse - Correct Answer-The junction where one neuron communicates with
another.
Presynaptic neuron - Correct Answer-The neuron sending the signal.
Postsynaptic neuron - Correct Answer-The neuron receiving the signal.
Neurotransmitters - Correct Answer-Chemical messengers that cross the
synaptic gap to transmit signals.
Excitatory neurotransmitters - Correct Answer-Increase the likelihood of an
action potential in the postsynaptic neuron (e.g., glutamate).
199 Actual Questions and Answers Latest
Updated 2025/2026 (Graded A+)
Neurons - Correct Answer-Specialized cells for transmitting electrical signals
in the nervous system.
Sensory neurons - Correct Answer-Transmit sensory information from sensory
receptors to the brain and spinal cord.
Motor neurons - Correct Answer-Carry commands from the brain and spinal
cord to muscles and glands.
Interneurons - Correct Answer-Communicate between sensory and motor
neurons within the brain and spinal cord.
Glial Cells - Correct Answer-Support neurons by providing structural support,
nutrients, insulation, and waste removal.
Astrocytes - Correct Answer-Provide support and nutrition to neurons,
maintain the blood-brain barrier.
Oligodendrocytes - Correct Answer-Form myelin in the central nervous system
(CNS).
Schwann cells - Correct Answer-Form myelin in the peripheral nervous system
(PNS).
Microglia - Correct Answer-Act as the immune system of the brain, cleaning
up dead neurons and pathogens.
,Central Nervous System (CNS) - Correct Answer-Includes the brain and spinal
cord. It processes sensory information and coordinates body functions.
Peripheral Nervous System (PNS) - Correct Answer-Composed of sensory and
motor neurons outside the CNS.
Somatic nervous system - Correct Answer-Controls voluntary movements of
skeletal muscles.
Autonomic nervous system - Correct Answer-Controls involuntary functions
(heart rate, digestion) and is divided into sympathetic and parasympathetic
systems.
Lesion studies - Correct Answer-Involves damaging specific areas of the brain
to observe changes in behavior.
Electroencephalogram (EEG) - Correct Answer-Measures electrical activity in
the brain by placing electrodes on the scalp.
Functional MRI (fMRI) - Correct Answer-Measures brain activity by detecting
blood flow changes, indicating areas of the brain that are active during specific
tasks.
Positron Emission Tomography (PET) - Correct Answer-Uses radioactive
substances to visualize active areas of the brain.
Single-cell recordings - Correct Answer-Measures the electrical activity of a
single neuron to study brain function in greater detail.
Cell body (soma) - Correct Answer-Contains the nucleus and organelles.
Dendrites - Correct Answer-Receive signals from other neurons.
Axon - Correct Answer-Transmits electrical impulses away from the cell body.
, Myelin sheath - Correct Answer-Insulates the axon, speeding up signal
transmission.
Axon terminals - Correct Answer-Release neurotransmitters to communicate
with other neurons.
Resting potential - Correct Answer-The neuron's membrane potential at rest is
negative (~-70 mV) due to ion distribution.
Depolarization - Correct Answer-When a neuron receives a stimulus, sodium
(Na⁺) channels open, and Na⁺ ions rush in, making the inside of the cell more
positive.
Repolarization - Correct Answer-Potassium (K⁺) channels open, and K⁺ ions
exit the neuron, returning the membrane potential to negative.
Hyperpolarization - Correct Answer-The membrane potential becomes more
negative than the resting potential.
Refractory period - Correct Answer-The neuron cannot fire another action
potential during this period.
Synapse - Correct Answer-The junction where one neuron communicates with
another.
Presynaptic neuron - Correct Answer-The neuron sending the signal.
Postsynaptic neuron - Correct Answer-The neuron receiving the signal.
Neurotransmitters - Correct Answer-Chemical messengers that cross the
synaptic gap to transmit signals.
Excitatory neurotransmitters - Correct Answer-Increase the likelihood of an
action potential in the postsynaptic neuron (e.g., glutamate).
