AAET NCV/EMG Exam UPDATED
QUESTIONS AND CORRECT ANSWERS
Ion - CORRECT ANSWER What describes an atom in which the total number of
electrons is not equal to the total number of protons, giving the atom a net positive or
negative electrical charge?
Electron - CORRECT ANSWER What is the negatively charged particle in an atom?
Neutrons - CORRECT ANSWER What has neutral particles, along with protons, and is
found in the nucleus of an atom?
Protons - CORRECT ANSWER Which particles of an atom are positively charged?
Atoms - CORRECT ANSWER What makes up the elements found in all matter?
-90 to -70mV - CORRECT ANSWER What is the voltage inside the nerve cell
membrane in a resting membrane potential?
Sodium - CORRECT ANSWER What is the major ion outside a cell membrane?
Potassium - CORRECT ANSWER What is the major ion inside a cell membrane?
All Or None Response - CORRECT ANSWER What is the physiological term when
depolarization occurs it causes a muscle and/or nerve fiber to either respond to a stimulus
completely if it reaches threshold or no response if the depolarization is insufficient to reach
threshold?
Depolarization - CORRECT ANSWER What describes changing from a resting
potential or polarized state to an excited state?
,Depolarization - CORRECT ANSWER What causes the inside of the cell to be more
positively charged relative to its resting state?
Repolarization - CORRECT ANSWER What describes when nerve cells are changed
from an excited state back to a resting electrical potential or polarized state?
Hyperpolarization - CORRECT ANSWER What causes the inside of the cell to be
more negatively charged relative to its resting state?
Absolute Refractory Period - CORRECT ANSWER During the repolarization phase,
sodium channels become inactivated and cannot be opened no matter how much
depolarization occurs and no action potential can be generated no matter how strong the
stimulus. What is this?
Relative Refractory Period - CORRECT ANSWER In the later stages of repolarization,
a brief increase in the permeability to potassium occurs and this results in hyperpolarizing the
membrane and returning it slowly to its resting value during which time an increasing number
of sodium channels can be opened. If you give a strong stimulus, it might be possible for
another action potential to occur. This time is known as the?
Saltatory Conduction - CORRECT ANSWER Propagation of action potentials along
myelinated axons from one Node of Ranvier to the next Node of Ranvier is called?
Schawnn Cells - CORRECT ANSWER What is the name of the cells that are
surrounding the axon to form the myelin sheath?
Nodes of Ranvier - CORRECT ANSWER What describes the periodic gaps in the
insulating sheath (myelin) on the axon through which ion channels allow the flow of ions
across the nerve membrane?
Internodal Length - CORRECT ANSWER The length between two nodes of Ranvier is
called?
, Sodium-Potassium Pump - CORRECT ANSWER Forcing sodium out of the cell and
potassium in is the function of what?
Diameter of the axon and degree of myelination - CORRECT ANSWER What can
increase or decrease the conduction velocity of a nerve?
Unmyelinated Fibers - CORRECT ANSWER What types of fibers mediate pain,
temperature, and autonomic function?
Fascicles - CORRECT ANSWER Nerve fiber bundles' having a common destination
describes?
Perineurium - CORRECT ANSWER Each individual fascicle is surrounded by
connective tissue called?
Endoneurium - CORRECT ANSWER What is the connective tissue between individual
axons called?
Epineurium - CORRECT ANSWER What is the name of the outer supportive layer of
connective tissue which surrounds the whole nerve and binds fascicles to each other?
Type- A fibers are myelinated fibers of somatic nerve that can innervate muscle or skin Type
B- fibers are myelinated preganglionic fibers - CORRECT ANSWER What types of
nerve fibers are myelinated?
Type C - because it is unmyelinated - CORRECT ANSWER Which type of nerve fiber
is not fast and why?
Type B -These fibers are myelinated but not as heavily as type A - CORRECT
ANSWER Which nerve fiber is fast but not as fast as nerve fiber type A?
QUESTIONS AND CORRECT ANSWERS
Ion - CORRECT ANSWER What describes an atom in which the total number of
electrons is not equal to the total number of protons, giving the atom a net positive or
negative electrical charge?
Electron - CORRECT ANSWER What is the negatively charged particle in an atom?
Neutrons - CORRECT ANSWER What has neutral particles, along with protons, and is
found in the nucleus of an atom?
Protons - CORRECT ANSWER Which particles of an atom are positively charged?
Atoms - CORRECT ANSWER What makes up the elements found in all matter?
-90 to -70mV - CORRECT ANSWER What is the voltage inside the nerve cell
membrane in a resting membrane potential?
Sodium - CORRECT ANSWER What is the major ion outside a cell membrane?
Potassium - CORRECT ANSWER What is the major ion inside a cell membrane?
All Or None Response - CORRECT ANSWER What is the physiological term when
depolarization occurs it causes a muscle and/or nerve fiber to either respond to a stimulus
completely if it reaches threshold or no response if the depolarization is insufficient to reach
threshold?
Depolarization - CORRECT ANSWER What describes changing from a resting
potential or polarized state to an excited state?
,Depolarization - CORRECT ANSWER What causes the inside of the cell to be more
positively charged relative to its resting state?
Repolarization - CORRECT ANSWER What describes when nerve cells are changed
from an excited state back to a resting electrical potential or polarized state?
Hyperpolarization - CORRECT ANSWER What causes the inside of the cell to be
more negatively charged relative to its resting state?
Absolute Refractory Period - CORRECT ANSWER During the repolarization phase,
sodium channels become inactivated and cannot be opened no matter how much
depolarization occurs and no action potential can be generated no matter how strong the
stimulus. What is this?
Relative Refractory Period - CORRECT ANSWER In the later stages of repolarization,
a brief increase in the permeability to potassium occurs and this results in hyperpolarizing the
membrane and returning it slowly to its resting value during which time an increasing number
of sodium channels can be opened. If you give a strong stimulus, it might be possible for
another action potential to occur. This time is known as the?
Saltatory Conduction - CORRECT ANSWER Propagation of action potentials along
myelinated axons from one Node of Ranvier to the next Node of Ranvier is called?
Schawnn Cells - CORRECT ANSWER What is the name of the cells that are
surrounding the axon to form the myelin sheath?
Nodes of Ranvier - CORRECT ANSWER What describes the periodic gaps in the
insulating sheath (myelin) on the axon through which ion channels allow the flow of ions
across the nerve membrane?
Internodal Length - CORRECT ANSWER The length between two nodes of Ranvier is
called?
, Sodium-Potassium Pump - CORRECT ANSWER Forcing sodium out of the cell and
potassium in is the function of what?
Diameter of the axon and degree of myelination - CORRECT ANSWER What can
increase or decrease the conduction velocity of a nerve?
Unmyelinated Fibers - CORRECT ANSWER What types of fibers mediate pain,
temperature, and autonomic function?
Fascicles - CORRECT ANSWER Nerve fiber bundles' having a common destination
describes?
Perineurium - CORRECT ANSWER Each individual fascicle is surrounded by
connective tissue called?
Endoneurium - CORRECT ANSWER What is the connective tissue between individual
axons called?
Epineurium - CORRECT ANSWER What is the name of the outer supportive layer of
connective tissue which surrounds the whole nerve and binds fascicles to each other?
Type- A fibers are myelinated fibers of somatic nerve that can innervate muscle or skin Type
B- fibers are myelinated preganglionic fibers - CORRECT ANSWER What types of
nerve fibers are myelinated?
Type C - because it is unmyelinated - CORRECT ANSWER Which type of nerve fiber
is not fast and why?
Type B -These fibers are myelinated but not as heavily as type A - CORRECT
ANSWER Which nerve fiber is fast but not as fast as nerve fiber type A?
