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AAET NCV| EMG Questions with 100% Correct Answers Graded A 2024 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 - Ion

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AAET NCV| EMG Questions with
100% Correct Answers
Graded A 2024

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 - Ion

What is the negatively charged particle in an atom? - Electron

What has neutral particles, along with protons, and is found in the nucleus of
an atom? - Neutrons

Which particles of an atom are positively charged? - Protons

What makes up the elements found in all matter? - Atoms

What is the voltage inside the nerve cell membrane in a resting membrane
potential? - - 90 to -70mV

What is the major ion outside a cell membrane? - Sodium

What is the major ion inside a cell membrane? - Potassium

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? - All or non response

What describes changing from a resting potential or polarized state to an
excited state?
- Depolarization

What causes the inside of the cell to be more positively charged relative to its
resting state? - Depolarization

What describes when nerve cells are changed from an excited state back
to a resting electrical potential or polarized state? - Repolarization

What causes the inside of the cell to be more negatively charged relative to
its resting state? - Hyperpolarization

,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? -
Absolute refractory period

, 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 - relative refractory period

Propagation of action potentials along myelinated axons from one Node of
Ranvier to the next Node of Ranvier is called? - Saltatory conduction

What is the name of the cells that are surrounding the axon to form the
myelin sheath? - Schwann Cells

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? - Nodes of Ranvier

The length between two nodes of Ranvier is called? - Internodal length

Forcing sodium out of the cell and potassium in is the function of what?
- Sodium- potassium pump

What can increase or decrease the conduction velocity of a nerve? -
Diameter of the axon and degree of myelination

What type of fibers mediate pain, temperature, and autonomic function? -
Unmyelinated fibers

Nerve fiber bundles' having a common destination describes? - Fascicles

Each individual fascicle is surrounded by connective tissue called? -
Perineurium

What is the connective tissue between individual axons called? - Endoneurium

What is the name of the outer supportive layer of connective tissue which
surrounds the whole nerve and binds fascicles to each other? - Epineurium

What types of nerve fibers are myelinated? - Type-A fibers are
myelinated fibers of somatic nerve that can innervate muscle or skin
Type B fibers are myelinated preganglionic fibers

Which type of nerve fiber is not fast and why? - Type C, unmyelinated

Which nerve fiber is fast but not as fast as nerve fiber type A? - Type B -
these fibers are myelinated but not as heavily as type A

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