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A membrane potential becomes more positive or less negative when the cell experiences depolarization. This occurs when there is an influx of positively charged ions, such as sodium (Na+), into the cell, which reduces the negativity of the resting membrane potential. This change can trigger action potentials in excitable cells, such as neurons and muscle cells, facilitating communication and contraction. Conversely, hyperpolarization makes the membrane potential more negative, typically due to the influx of chloride ions (Cl-) or efflux of potassium ions (K+).
What else can I help you with?
If you multiply a negative by a negative is it a positive?
Yes, any time you multiply a negative by a negative, it automatically becomes a positive.
What will happen to the slope of a line if the line is shifted so that the y intercept increases and the x intercept remains the same?
The answer depends on the signs of the original intercepts.x negative, y negative: negative slope becomes less negative and could go positive.x negative, y positive: positive slope becomes greater.x positive, y negative: positive slope becomes less positive and could go negative.x positive, y positive: negative slope becomes more negative.For 1 and 3, the slope changes sign when the y intercept crosses the origin.
When you add a negative number by a negative number do you get a negative or positive number?
You get a positive number because a negative number reverses the other negative so it becomes a positive number.
What does it mean for a negative to be decreased by a negative?
It becomes less negative To explain. Lets take a negative, eg -5. If we decrease it by 1, it becomes -6 (where 1 is positive) Thus if we decrease it by -1, it becomes -4 (as the -1 is negative) Note that the final number could be positive, For example, if you decrease -5 by -6, you get +1
Are all whole numbers positive or negative?
All integers can be positive or negative, including zero. But zero on its own is neither positive nor negative. It is directly inbetween where one becomes the other.
If a resting potential becomes more negative what happens to the cell?
When the membrane potential becomes more negative it is being hyperpolarized. Remember the resting membrane potential is already at a negative state (~70mV). So if you are making a comparison of a membrane potential that is hyperpolarized in comparison to a resting membrane potential, the resting membrane potential is said to be more depolarized.When the membrane potential becomes more positive it is called depolarization.
When the membrane potential becomes more negative is it hyperpolarized?
Yes, when the membrane potential becomes more negative, it is referred to as hyperpolarization. This occurs when the inside of the cell becomes less positive or more negative relative to the outside, often due to the influx of negatively charged ions or the efflux of positively charged ions. Hyperpolarization makes it less likely for a neuron to fire an action potential.
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.
If a resting neuron is stimulated and there is an inward flow of positive charges into the cell the membrane potential will?
If a resting neuron is stimulated and there is an inward flow of positive charges into the cell, the membrane potential will depolarize, meaning the inside of the cell becomes less negative. This can trigger an action potential if the depolarization reaches the threshold level.
How is the resting potential different from repolarization?
The resting potential is the stable membrane potential of a cell at rest, typically around -70mV. Repolarization refers to the return of the membrane potential to its resting value after depolarization, where the cell becomes more negative again due to potassium channels opening.
What is a reduction in membrane potential called?
A reduction in membrane potential is called hyperpolarization. This occurs when the inside of the cell becomes more negative than the outside, making it less likely for the cell to generate an action potential.
When three negative are multiplied is the product positive or negative?
It is a positive. When you multiply a negative and a negative, it becomes a positive, then you multipy the positive with the other positive
How do you add a negative by a negative?
you make it a positive because negative add negative becomes a positive
The process of depolarization and repolarization is called?
The process of depolarization and repolarization is called an action potential. During depolarization, the cell's membrane potential becomes more positive, while during repolarization, the membrane potential returns to its resting state.
What is the rapid change in a membrane potential caused by the depolarization of a neuron?
The rapid change in membrane potential caused by the depolarization of a neuron is known as an action potential. This occurs when the neuron's membrane potential becomes less negative, reaching a threshold that triggers voltage-gated sodium channels to open, allowing sodium ions to rush into the cell. This influx of positive ions causes a swift rise in the membrane potential, resulting in a spike that propagates along the neuron, enabling the transmission of electrical signals. Following this, the neuron repolarizes as potassium channels open to restore the resting membrane potential.
Influx of Na plus till 70mV?
The electrical potential difference across a cell membrane (the resting potential) is around -65 mV, inside negative. In nerve cells (neurones) or muscle cells this potential difference is reversed during an action potential. Sodium (Na+) channels open and Na+ ions enter the cell down their concentration gradient. This entry of positive charge depolarises the membrane ie it cancels out the resting pootential and then reverses it, so the potential becomes positive inside and negative outside, giving a potential of about +50mV.
What happens when its a negative times positive?
Becomes a negative.
