NUR 8022 EXAM 1 QUESTIONS AND
ANSWERS 2025 GRADED A+
The resting membrane potential is closest to the equilibrium potential for the ion
with the highest permeability! This concept is called _________.
The Goldman Hodgkin Katz Equation
_________ is the process during the action potential when sodium is rushing into
the cell causing the interior to become more positive. (less negative)
Depolarization
_________ is the movement of the membrane potential of a cell away from rest
potential in a more negative direction.
Hyperpolarization
Membrane potential at which occurrence of the AP is inevitable is called
___________.
Threshold potential
,______ is a portion of the AP where the membrane potential is positive (cell
interior is positive).
Overshoot
_______ is a portion of the AP, followed by repolarization where at membrane
potential is more negative than at rest.
Undershoot also called hyper polarizing
AD
Flow of positive charge into the cell
These currents depolarize the membrane potential (or make it less negative and
more positive)
Ex: Na+ flow into the cell during the UPSTROKE of the AP
Inward current
,Flow of positive charge out of the cell; these currents hyper polarize the membrane
potential (making the membrane more negative and less positive)
Example: flow of K+ out of the cell during the depolarization phase of AP,
creating down stroke
Outward Current
NA+ moves in.. this action is called______.
depolarization
K+ moves out.. this action is called______.
Repolarization
Process by which Myelin decreased ion flow through the membrane
Mylenation
_______ surround the nerve axon forming a myelin sheath
Schwann Cells
, Promotes stability; cancels out the original response. Ex: High FSBS, increased
insulin by the pancreas
Negative Feedback
Promotes a change in one direction; instability, DISEASE. Ex: Blood clotting,
platelet cascade
Positive Feedback
AD
________ provide selectivity to a membrane
Proteins
__________ are channels, pores, carriers, enzymes, receptors, second messengers
Integral proteins
_____ are Enzymes, intracellular, signal mediators
Peripheral proteins
ANSWERS 2025 GRADED A+
The resting membrane potential is closest to the equilibrium potential for the ion
with the highest permeability! This concept is called _________.
The Goldman Hodgkin Katz Equation
_________ is the process during the action potential when sodium is rushing into
the cell causing the interior to become more positive. (less negative)
Depolarization
_________ is the movement of the membrane potential of a cell away from rest
potential in a more negative direction.
Hyperpolarization
Membrane potential at which occurrence of the AP is inevitable is called
___________.
Threshold potential
,______ is a portion of the AP where the membrane potential is positive (cell
interior is positive).
Overshoot
_______ is a portion of the AP, followed by repolarization where at membrane
potential is more negative than at rest.
Undershoot also called hyper polarizing
AD
Flow of positive charge into the cell
These currents depolarize the membrane potential (or make it less negative and
more positive)
Ex: Na+ flow into the cell during the UPSTROKE of the AP
Inward current
,Flow of positive charge out of the cell; these currents hyper polarize the membrane
potential (making the membrane more negative and less positive)
Example: flow of K+ out of the cell during the depolarization phase of AP,
creating down stroke
Outward Current
NA+ moves in.. this action is called______.
depolarization
K+ moves out.. this action is called______.
Repolarization
Process by which Myelin decreased ion flow through the membrane
Mylenation
_______ surround the nerve axon forming a myelin sheath
Schwann Cells
, Promotes stability; cancels out the original response. Ex: High FSBS, increased
insulin by the pancreas
Negative Feedback
Promotes a change in one direction; instability, DISEASE. Ex: Blood clotting,
platelet cascade
Positive Feedback
AD
________ provide selectivity to a membrane
Proteins
__________ are channels, pores, carriers, enzymes, receptors, second messengers
Integral proteins
_____ are Enzymes, intracellular, signal mediators
Peripheral proteins
