0
How does the sodium and potassium pump act to maintain the resting membrane potential?
Wiki User
∙ 9y ago
Primary active transport is the process in which ions are moved across cell membranes against the electrochemical gradient using energy supplied directly be ATP. The action of the sodium-potassium pump is an important example of primary active transport.
Secondary active transport is indirectly driven by primary transport. In the sodium-potassium pump, by pumping against the gradient, energy is stored in the ion gradient. Then, just as water pumped uphill can do the work as it flows back down, (think water wheel or turbine), a substance pumped across the membrane can do work as it leaks back, propelled downhill along the concentration gradient.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoyes! I think so! In depolarization there are excess positive sodium ions inside, "sodium-potassium pump" pumps these excess sodium ions outside and restore the membrane to its resting potential.
Wiki User
∙ 12y agoPumps sodium ions out of the cell and potassium ions into the cell. This action allows the cell to reach it's resting potential.
-Your welcome.
Wiki User
∙ 11y agomaintaining the concentration gradients for Na+ and K+ across the cell membrane
Add your answer:
Earn +20 pts
Why is there a resting membrane potential across the cell membrane?
sodium/potassium pump
The membrane-bound enzyme system that restores and maintains the resting membrane potential is what pump?
sodium-potassium
Through the membrane of a resting neuron highly permeable to potassium ions its membrane potential does not exactly match the equilibrium potential for potassium because the neuronal membrane is?
Slightly permeable to sodium ions.
Ions used to establish a resting potential?
Potassium and sodium determine the a cell's resting membrane potential. The equilibrium potential (the voltage where no ion would flow) for sodium is about +60 mV while that for potassium is usually around -80 mV, but because the resting cell membrane is approximately 75 times more permeable to potassium than to sodium, the resting potential is closer the the equilibrium potential of potassium. This is because potassium leak channels are always open while sodium come in through voltage gated or ligand gated channels.
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
Why is there a resting membrane potential across the cell membrane?
sodium/potassium pump
The membrane-bound enzyme system that restores and maintains the resting membrane potential is what pump?
sodium-potassium
Through the membrane of a resting neuron highly permeable to potassium ions its membrane potential does not exactly match the equilibrium potential for potassium because the neuronal membrane is?
Slightly permeable to sodium ions.
Ions used to establish a resting potential?
Potassium and sodium determine the a cell's resting membrane potential. The equilibrium potential (the voltage where no ion would flow) for sodium is about +60 mV while that for potassium is usually around -80 mV, but because the resting cell membrane is approximately 75 times more permeable to potassium than to sodium, the resting potential is closer the the equilibrium potential of potassium. This is because potassium leak channels are always open while sodium come in through voltage gated or ligand gated channels.
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.
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 will happen to a person's resting membrane potential if they take potassium enhanced intravenous solution?
A potassium enhanced intravenous solution would increase the concentration of potassium ions in the brain. Since potassium ions are positively charged, they depolarize the resting membrane potential. For example, a resting membrane potential of -65 millivolts would be depolarized to -62 millivolts. An appropriate concentration could lead to a significant depolarization of, say, -60 millivolts, at which point an action potential could be possible.
Does the sodium or potassium pump provide energy for neurons but does not affect resting membrane potential?
False
What accounts for the resting membrane potential seen in unstimulated nerve and muscle cells?
Sodium-potassium pump
What is the approximate resting potential of a neuron?
It is -70 millivolts. The resting potential of a neuron refers to the voltage difference across the plasma membrane of the cell, and is expressed as the voltage inside the membrane relative to the voltage outside the membrane. The typical resting potential voltage for a neuron is -70mV Resting potentials occur because of the difference in concentration of ions inside and outside of the cell, largely by K+ (Potassium ions) but some contribution is made by Na+(Sodium ions)
What helps maintain the resting potential of a neuron?
During resting potential, the Sodium-Potassium pump is inactive. Therefore, it is indirectly responsible for the resting potential. However, Potassium diffuses outside the membrane via "leakage" channels, and causes the resting potential.
What is the charge on the inside membrane during the resting membrane potential?
The resting membrane potential of a typical neuron is around -65mV
