WGU D574 NEUROPSYCHOLOGY 278 ACTUAL
TEST PAPER QUESTIONS AND SOLUTIONS
◉ synapse.
Answer: junction between two neurons where chemical signals are
transmitted from one neuron to another
◉ action potential.
Answer: messages sent by axons, characterized by depolarization of
the neuron membrane
◉ all-or-none law.
Answer: the principle stating that all action potentials, once
initiated, are approximately equal in amplitude and velocity,
regardless of the intensity of the stimulus
◉ depolarization.
Answer: reduction of the difference in electrical charge between the
inside and outside of a neuron, leading to the initiation of an action
potential
◉ hyperpolarization.
,Answer: increased polarization of the neuron membrane, resulting
in a more negative charge inside the cell compared to the outside
◉ nodes of Ranvier.
Answer: short sections along myelinated axons where the myelin
sheath is interrupted, facilitating rapid transmission of action
potentials
◉ refractory period.
Answer: period during which the neuron membrane is resistant to
starting another action potential immediately after an action
potential
◉ resting potential.
Answer: the electrical charge difference between the inside and
outside of a neuron when it is not transmitting signals.
◉ excitatory postsynaptic potential (EPSP).
Answer: a graded depolarization of a postsynaptic neuron's
membrane, making it more likely to generate an action potential
◉ inhibitory postsynaptic potential (IPSP).
Answer: a graded hyperpolarization of a postsynaptic neuron's
membrane, making it less likely to generate an action potential
, ◉ reflex arc.
Answer: the neural pathway that mediates a reflex action
◉ temporal summation.
Answer: the process by which multiple EPSPs or IPSPs occurring in
rapid succession at the same synapse combine to influence a
neuron's membrane potential
◉ synaptic delay.
Answer: the brief delay between the arrival of an action potential at
the presynaptic terminal and the initiation of a postsynaptic
response
◉ synaptic transmission.
Answer: the process by which neurons communicate with each
other at synapses using neurotransmitters
◉ synaptic vesicles.
Answer: small sacs within presynaptic terminals that store
neurotransmitters before their release
◉ synaptic inhibition.
TEST PAPER QUESTIONS AND SOLUTIONS
◉ synapse.
Answer: junction between two neurons where chemical signals are
transmitted from one neuron to another
◉ action potential.
Answer: messages sent by axons, characterized by depolarization of
the neuron membrane
◉ all-or-none law.
Answer: the principle stating that all action potentials, once
initiated, are approximately equal in amplitude and velocity,
regardless of the intensity of the stimulus
◉ depolarization.
Answer: reduction of the difference in electrical charge between the
inside and outside of a neuron, leading to the initiation of an action
potential
◉ hyperpolarization.
,Answer: increased polarization of the neuron membrane, resulting
in a more negative charge inside the cell compared to the outside
◉ nodes of Ranvier.
Answer: short sections along myelinated axons where the myelin
sheath is interrupted, facilitating rapid transmission of action
potentials
◉ refractory period.
Answer: period during which the neuron membrane is resistant to
starting another action potential immediately after an action
potential
◉ resting potential.
Answer: the electrical charge difference between the inside and
outside of a neuron when it is not transmitting signals.
◉ excitatory postsynaptic potential (EPSP).
Answer: a graded depolarization of a postsynaptic neuron's
membrane, making it more likely to generate an action potential
◉ inhibitory postsynaptic potential (IPSP).
Answer: a graded hyperpolarization of a postsynaptic neuron's
membrane, making it less likely to generate an action potential
, ◉ reflex arc.
Answer: the neural pathway that mediates a reflex action
◉ temporal summation.
Answer: the process by which multiple EPSPs or IPSPs occurring in
rapid succession at the same synapse combine to influence a
neuron's membrane potential
◉ synaptic delay.
Answer: the brief delay between the arrival of an action potential at
the presynaptic terminal and the initiation of a postsynaptic
response
◉ synaptic transmission.
Answer: the process by which neurons communicate with each
other at synapses using neurotransmitters
◉ synaptic vesicles.
Answer: small sacs within presynaptic terminals that store
neurotransmitters before their release
◉ synaptic inhibition.
