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During depolarization does the neurons membrane become negative?
During depolarization, the neuron's membrane potential becomes less negative as positive ions enter the cell. This is due to the opening of voltage-gated sodium channels, allowing sodium ions to flow into the cell.
Which term describes the difference in the substance across a cells membrane?
Concentration Gradient.. :)
Which term describes the differene in the conentrations of a substance across a cells membrane?
concentration gradient
What behavior is observed if the voltage across a neuronal membrane is set to -20 mV?
If the voltage across a neuronal membrane is set to -20 mV, this would be closer to the threshold potential for neuron firing, leading to an increased likelihood of the neuron generating an action potential. At this level, the neuron is closer to depolarization and may be more excitable compared to when the membrane potential is at resting potential.
Almost as soon as the depolarization wave begins a repolarization wave follows it across the membrane this occurs as?
Almost as soon as the depolarization wave begins, voltage-gated potassium channels open in response to the increase in membrane potential, allowing potassium ions to move out of the cell. This efflux of potassium ions causes repolarization of the cell membrane by restoring the negative resting membrane potential.
What is a membrane potential?
a voltage or electrical charge across the plasma membrane
How does the membrane generate voltage to create a membrane potential?
All cells have voltages across their plasma membranes. Voltage is electrical potential energy, which is a separation of opposite charges. The Cytoplasm of a cell is negative compared to extracellular fluid because of an unequal distribution of anions and cations which are on opposite sides of the membrane. The voltage created by that is is called the Membrane Potential. Which usually ranges from about -50 to -200 millivolts. The inside of the cell is negative compared to the outside, the why the they have the minus signs.
Which term describes describes the difference in the concentration of a substance across a cells membrane?
This is called the osmotic gradient.
During depolarization does the neurons membrane become negative?
During depolarization, the neuron's membrane potential becomes less negative as positive ions enter the cell. This is due to the opening of voltage-gated sodium channels, allowing sodium ions to flow into the cell.
How do you charge a capacitor?
You charge a capacitor by placing DC voltage across its terminal leads. Make sure when using a polarized capacitor to place positive voltage across the positive lead (the longer lead) and negative voltage across the negative lead. Also make sure that the voltage you charge the capacitor to doesn't exceeds its voltage rating.
Which term describes the difference in the substance across a cells membrane?
Concentration Gradient.. :)
Describes the difference in the concentrations of a substance across a cell membrane?
action potential
What term describes the difference in the concentration of a across a cells membrane?
action potential
What describes the difference in the concentrations of a substance across a cells membrane?
action potential
What term describes the difference in the concentration of a substance across a cell membrane?
concentration gradient
What term describes the difference in the concentrations of a substance across a cell membrane?
concentration gradient
What term describes the difference in concentrations of a substance across a cells membrane?
action potential
