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What ions are found on the outside and on the inside of an axon
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∙ 13y ago
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Is calcium more concentrated inside or outside the cell?
Overall none, or the cell would swell or shrink until the osmotic pressure becomes the same. But : most of the sodium is outside & most of the potasium is inside. most of the proteins are inside most of the sugar is outside (depending on insulin).
What is the solution called when the cell is in equilibrium called?
A cell that is in an isotonic solution is in equilibrium with the solution. What ions and water outside of the cell is the same as the ions and water that is inside the cell. The term -iso means the same.
The state during which a neuron contains more negatively charged ions inside the cell than outside the cell and is not firing is referred to as the?
resting potential
What is a brief description of the action of the sodium-potassium pump?
The sodium-potassium pump is a transmembrane protein in a cell membrane. It keeps large concentrations of sodium ions outside the cell, and potassium ions inside the cell. It does this by pumping the sodium ions out, and the potassium ions in.
The concentration of potassium ions inside the cell is usually what?
The concentration of potassium ions inside the cell is usually MORE THEN then the concentration of potassium.
What causes the inside of neuron becomes positive?
Outside a neuron, there are mostly sodium ions but some potassium ions. Inside the neuron, there are only potassium ions. Since both sodium and potassium are positive ions, and they are in a higher concentration outside the cell, that makes the outside have a more positive charge than the inside. But for all intents and purposes, the outside is positive, and the inside is negative. When the sodium ions (Na+) rush into the cell during depolarization, it causes the concentration of positive ions inside the cell to go WAY up, making the inside more positive than the outside. This means that the outside is now negative and the inside now positive.
Are there more sodium ions inside or outside a cardiac muscle cell during the resting membrane potential?
Outside
Is calcium more concentrated inside or outside the cell?
Overall none, or the cell would swell or shrink until the osmotic pressure becomes the same. But : most of the sodium is outside & most of the potasium is inside. most of the proteins are inside most of the sugar is outside (depending on insulin).
A resting potential is caused by a difference in the concentration of certain ions inside and outside the cell?
True
Is resting potential caused by a difference in the concentration of certain ions inside and outside the cell?
True
What is the solution called when the cell is in equilibrium called?
A cell that is in an isotonic solution is in equilibrium with the solution. What ions and water outside of the cell is the same as the ions and water that is inside the cell. The term -iso means the same.
Movement of sodium ions from a region of lower concentration inside a cell toward a region of higher concentration outside the cell is accomplished by?
active transport
The state during which a neuron contains more negatively charged ions inside the cell than outside the cell and is not firing is referred to as the?
resting potential
How does the inside of the resting neuron compare to the outside in terms of electrical charge and Na plus concentration?
The concentration of negatively charged proteins and positively charged potassium ions, K+, is greater inside the cell than outside. In contrast, the concentration of sodium ions, Na+, is greater outside the cell than inside. The concentrations of Na+ and K+ ions are partly due to the action of the sodium-potassium pump, which actively moves Na+ out of cells while moving K+ in.
What is the state when an electrical charge of a neuron is said to be at a resting potential?
The resting potential is the normal equilibrium charge difference (potential gradient) across the neuronal membrane, created by the imbalance in sodium, potassium, and chloride ions inside and outside the neuron.
What is a brief description of the action of the sodium-potassium pump?
The sodium-potassium pump is a transmembrane protein in a cell membrane. It keeps large concentrations of sodium ions outside the cell, and potassium ions inside the cell. It does this by pumping the sodium ions out, and the potassium ions in.
Why is the resting potential value of a membrane negative?
The resting membrane potential is the difference between the inside of the cell relative to the outside. The outside is always taken as 0mv. The resting membrane potential is negative because there is a higher concentration of potassium ions outside the cell (because the membrane is more permeable to potassium ions) than inside. Since potassium ions are positively charged this leads to a negative value.
