The name of this type of molecule refers to an atom that has either a positive or negative charge
What is an ion
100
The phase in which the electrical potential of the cell is being maintained
What is the resting potential
100
The principle that states once an action potential is triggered it will not stop until the entire action potential is completed.
What is the all-or-none principle
100
This structure is also referred to as the cell wall. It regulates the concentration of ions inside and outside of the cell by creating an impermeable barrier.
What is the membrane
100
The typical voltage across the cell membrane of a cell at rest
What is -70mv
200
The unit of measure for electricity
What is a volt or millivolt
200
The small fluctuations in voltage across the cell membrane that do not result in an action potential
What is a graded potential
200
Action potentials are usually propagated towards
What is the terminal buton (also accept any answer that suggests the proper direction ie. post synapse)
200
This structure maintains the voltage gradient across the cell membrane during resting potential.
What is the sodium-potassium pump
200
The typical voltage across the cell membrane of a cell that will cause an action potential
What is -50mv (also accept -40mv)
300
The amount of energy stored within a cell or battery
What is the electric potential
300
The point at which, once reached, causes a rapid shift in the voltage across the cell membrane
What is the threshold potential
300
Action potentials that are propagated retain the same level of this throughout the nerve impulse
What is intensity (also accept any answer that reflects the knowledge that it is propagated unchanged ie. voltage)
300
The term that refers to channels which open based on changes in the concentration of ions across the cell membrane.
What is voltage-sensitive
300
The typical voltage across the cell membrane of a cell that is at the peak of depolarization
What is 30mv (also accept any value above 0)
400
The amount of electrical energy in one particular area relative to other areas.
What is the voltage gradient
400
The phase of the action potential in which voltage across the cell membrane quickly shifts from a negative charge to a more positive charge.
What is depolarization
400
The principle that states that the effect of a nerve impulse is correlated with higher rates of nerve impulses in quick succession.
What is temporal summation
400
These gaps in myelin sheath allow for quicker propagation of action potentials
What are nodes of ranvier
400
What is the lowest typical voltage across the cell membrane of a cell at in hyperpolarization before it returns to rest.
What is -100 mv (also accept any value below -70mv)
500
The amount of ions in one area relative to the amount of ions in another area
What is the concentration gradient
500
The phase in which the voltage across the cell membrane quickly reverses from a positive charge back to a negative charge
What is repolarization
500
The principle that states that the effect of nerve impulses is correlated with the distance of nerve impulses from each other.
What is spatial summation
500
This pump opens in response to changes in voltage across the cell membrane AND stays open longer.
What is the potassium channel.
500
Higher concentrations of this molecule relative to others within the neuron contribute to its negative charge during resting potential
What is negatively charge protein molecules (also accept protein, or A-)