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Neurophysiology: Neurons,
Synapses, and Neurotransmitters
Overview Questions and Answers
(100% Correct Answers) Already
Graded A+
© 2026 Assignment
neuron Ans: respond to stimuli, conduct electrical activity,
release chemical regulators
Guru01 - Stuvia
Expert
Structural Classes of Neurons Ans: based on # of processes
Functional Classes of Neurons Ans: based on direction of
impulse
Glial Cells of the CNS Ans: Constitute about half of the cells in
the CNS, can divide by mitosis unlike neurons, provide
physical and metabolic support
Oligodendrocytes Ans: Insulates and covers axon, forms
myelin sheaths which speed up conduction of electrical signals
along axon
Myelin forming cells Ans: Oligodendrocytes in CNS, Schwann
cells in the Peripheral Nervous System (PNS)
Membrane potential Ans: Changes in membrane potential are
controlled by changes in the flow of ions through channels.
Voltage Gated Channels on Axons Ans: Closed at resting
potential
, 2
Threshold Ans: An approximate value needed for an action
potential to occur, where the stimulus strength doesn't matter
after passing this point.
Action Potential Ans: All or nothing electrical event in a single
cell where the membrane potential quickly becomes positive
and returns to resting potential.
Compound action potentials Ans: Sum together more than one
cell undergoing an action potential.
© 2026 Assignment
Refractory Periods Ans: A second stimulus will not produce an
action potential because Na+ channels are inactivated.
Guru01 - Stuvia
Expert
Second Refractory Period Ans: A second action potential can
happen only if stimulus strength is greater than usual because
some K+ channels still open.
Saltatory Conduction Ans: AP move faster due to 'leaping from
node to node' compared to ion channels located ALL along the
axon.
Myelinated Neurons Ans: Myelin prevents Na+ and K+ from
moving through the membrane.
Synapses Ans: Synapses can use both chemical and electrical
stimuli to pass information.
Synapses types Ans: can be excitatory or inhibitory depending
on the neurotransmitter (chemical signal) being transmitted.
Synapse Ans: A junction where impulses are transmitted from
neurons to target muscle or gland in the PNS.
Neurophysiology: Neurons,
Synapses, and Neurotransmitters
Overview Questions and Answers
(100% Correct Answers) Already
Graded A+
© 2026 Assignment
neuron Ans: respond to stimuli, conduct electrical activity,
release chemical regulators
Guru01 - Stuvia
Expert
Structural Classes of Neurons Ans: based on # of processes
Functional Classes of Neurons Ans: based on direction of
impulse
Glial Cells of the CNS Ans: Constitute about half of the cells in
the CNS, can divide by mitosis unlike neurons, provide
physical and metabolic support
Oligodendrocytes Ans: Insulates and covers axon, forms
myelin sheaths which speed up conduction of electrical signals
along axon
Myelin forming cells Ans: Oligodendrocytes in CNS, Schwann
cells in the Peripheral Nervous System (PNS)
Membrane potential Ans: Changes in membrane potential are
controlled by changes in the flow of ions through channels.
Voltage Gated Channels on Axons Ans: Closed at resting
potential
, 2
Threshold Ans: An approximate value needed for an action
potential to occur, where the stimulus strength doesn't matter
after passing this point.
Action Potential Ans: All or nothing electrical event in a single
cell where the membrane potential quickly becomes positive
and returns to resting potential.
Compound action potentials Ans: Sum together more than one
cell undergoing an action potential.
© 2026 Assignment
Refractory Periods Ans: A second stimulus will not produce an
action potential because Na+ channels are inactivated.
Guru01 - Stuvia
Expert
Second Refractory Period Ans: A second action potential can
happen only if stimulus strength is greater than usual because
some K+ channels still open.
Saltatory Conduction Ans: AP move faster due to 'leaping from
node to node' compared to ion channels located ALL along the
axon.
Myelinated Neurons Ans: Myelin prevents Na+ and K+ from
moving through the membrane.
Synapses Ans: Synapses can use both chemical and electrical
stimuli to pass information.
Synapses types Ans: can be excitatory or inhibitory depending
on the neurotransmitter (chemical signal) being transmitted.
Synapse Ans: A junction where impulses are transmitted from
neurons to target muscle or gland in the PNS.
