D574 FULL PRACTICE EXAM
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ LATEST 100%
GUARANTEED PASS
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;
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 of a neuron.
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.
Neurons - CORRECT ANSWER-Specialized for communication.
Cell body (soma) - CORRECT ANSWER-Contains the nucleus and organelles.
Glial Cells - CORRECT ANSWER-Provide support, insulation, and nourishment to 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).
Inhibitory neurotransmitters - CORRECT ANSWER-Decrease the likelihood of an action potential
(e.g., GABA).
Synaptic cleft - CORRECT ANSWER-The small gap between neurons where neurotransmitters are
released.
Brain - CORRECT ANSWER-Processes sensory information, generates thoughts, emotions, and
memories, and controls motor functions.
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ LATEST 100%
GUARANTEED PASS
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;
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 of a neuron.
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.
Neurons - CORRECT ANSWER-Specialized for communication.
Cell body (soma) - CORRECT ANSWER-Contains the nucleus and organelles.
Glial Cells - CORRECT ANSWER-Provide support, insulation, and nourishment to 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).
Inhibitory neurotransmitters - CORRECT ANSWER-Decrease the likelihood of an action potential
(e.g., GABA).
Synaptic cleft - CORRECT ANSWER-The small gap between neurons where neurotransmitters are
released.
Brain - CORRECT ANSWER-Processes sensory information, generates thoughts, emotions, and
memories, and controls motor functions.
