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There are many factors that contribute to the membrane potential of a cell. The driving force of ions which are a summation of voltage gradient and concentration gradient are an important one. Also other proteins and amino acids contribute to the cell's membrane potential.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoa voltage or electrical charge across the plasma membrane
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What is the electrical potential across the cell membrane of a nerve cell or muscle cell when the cell is not active?
resting potential
Electrical charge resulting from the difference between positive and negative ions outside and inside the brain cell membrane is called?
Membrane potential
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.
In the absence of stimuli all cells in the body maintain a potential difference across the semipermeable membrane in which the inside of the cell is negatively charged in comparison to the outside?
resting membrane potential
What cell membrane do action potentials travel along?
The membrane or resting potential is the difference in voltage within and outside the cell when that cell is at rest. In a typical neuron it is usually around -65mV, meaning the neuron is negatively charged relative to the extracellular space. This potential is due to various ions and the permeability of the neuronal membrane. When a neuron gets a signal from another neuron, this causes the concentration of various ions to change (some flow in, others out of, the cell). In some cases, the signal causes positive ions to flow into the cell, making the membrane potential less negative. Once it reaches a threshold, usually around -55mV, the cell "fires" or makes an action potential, which is when the membrane potential temporarily shoots up to around +40mV. This signal propagates down the length of the neuron and then passes that message on to other cells.
What is the electrical potential across the cell membrane of a nerve cell or muscle cell when the cell is not active?
resting potential
Electrical charge resulting from the difference between positive and negative ions outside and inside the brain cell membrane is called?
Membrane potential
What components of the cell membrane contribute to the mosaic quality of the cell membrane?
The Phospholipids and other steroids like cholesterol
What about a cell's resting membrane potential is FALSE?
The resting membrane potential is maintained by solely by passive transport processes.
The membrane potential of a cell favors?
movement of cations into the cell
Why is there a resting membrane potential across the cell membrane?
sodium/potassium pump
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.
What are two factors that help maintain the resting membrane potential of a typical nerve cell?
Yes, some quantity of energy is needed to maintain and develop resting potential of cell's membrane during the stages 1 and 2 of resting potential forming Cell uses energy of ATP at these stages for sodium potassium pump to create difference in K and Na ion concentration inside the cell and outside. For transportation 2 ions of potassium inside and 3 sodium ions outside the cell one molecule of ATP is needed
What is a polar cell?
It's called membrane potential.
What is polar cell?
It's called membrane potential.
What ion determines the resting membrane potential of nerve and muscle?
The concentrations on Na+ outside the cell and concentrations of K+ inside the cell determine the resting membrane potential.
What happens to animal cell in a solution with high water potential?
Animal cells lack rigid cell wall. When an animal cell is placed in a solution with high water potential, the wanter enters the cell as cell membrane is freely permeable to water. As a result of continuously increasing water potential inside the cell, Cell membrane bursts and the cell is said to be lysed.
