Question

In: Anatomy and Physiology

If the concentration of chloride is 10mM outside a neuron and 100mM inside the neuron, at...

  1. If the concentration of chloride is 10mM outside a neuron and 100mM inside the neuron, at what voltage will there be no net movement of chloride through open chloride channels?

123 mV

-32 mV

61.5 mV

-61.5 mV


Solutions

Expert Solution

Equilibrium potential is a membrane potential at which there is no net movement of ion through a channel.

  • We can calculate it by Nernst equation.
  • All other options are wrong because they are incorrect values.

Related Solutions

10 -During repolarization: a- Potassium ions move from inside the neuron to outside the neuron b-...
10 -During repolarization: a- Potassium ions move from inside the neuron to outside the neuron b- Voltage gated sodium channels open c- Potential difference returns to -70mv d- a & c e- None of the above
What is the resting potential? What are the charges inside and outside of the neuron? Which...
What is the resting potential? What are the charges inside and outside of the neuron? Which ions are found in and outside of the neuron? When the neuron is at a resting potential, is it polarized, depolarized, repolarized
If a cell has less concentration of solutes inside than outside, it is in a(n) ___________...
If a cell has less concentration of solutes inside than outside, it is in a(n) ___________ environment. Hypertonic Isotonic Hypotonic Mesotonic
The concentration of CO2 is lower inside a plant cell than in the atmosphere (outside the...
The concentration of CO2 is lower inside a plant cell than in the atmosphere (outside the cell). In your own words, describe how the CO2 levels are kept low inside the plant cell and explain why this is necessary. Assume the outer surface of the leaves of this plant have a waxy layer.
The K+ concentration inside a nerve cell is found to be 20x higher outside the cell...
The K+ concentration inside a nerve cell is found to be 20x higher outside the cell than inside the cell, while the Na+ concentration is 20x higher inside versus outside. A. If the membrane potential Em (Ein-Eout) is -77.6 mV, identify the ion that must be transported actively versus the ion that is near equilibrium (assuming ideal conditions). B. The NA+ -K+ -ATPase (or sodium-potassium pump), moves three sodium ions from inside to outside, and two potassium ions from outside...
Animal cells generally have a higher concentration of Na+ outside of the cell than inside the...
Animal cells generally have a higher concentration of Na+ outside of the cell than inside the cell and a membrane potential around -70 mV. When an Na+ moves into an animal cell, how does that movement impact the membrane potential? How does that movement impact the Na+ concentration gradient? Explain what an equilibrium potential for an ion is, what the resting membrane potential is, and how they are different.
A physicist examines 4 seawater samples for potassium chloride concentration. The mean potassium chloride concentration for...
A physicist examines 4 seawater samples for potassium chloride concentration. The mean potassium chloride concentration for the sample data is 0.604 cc/cubic meter with a standard deviation of 0.0177. Determine the 80% confidence interval for the population mean potassium chloride concentration. Assume the population is approximately normal. 1)Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. 2)Construct the 80% confidence interval. Round your answer to three decimal places.
In a winter season when outside temperature is –1oC, the inside of house is to be...
In a winter season when outside temperature is –1oC, the inside of house is to be maintained at 25oC. Estimate the minimum power required to run the heat pump of maintaining the temperature. Assume heating load as 125 MJ/h. What would be maximum efficiency of engine that      can be had between the temperatures of 1150oC       and 27oC ? 1.A heat engine is supplied with 278 kJ/s of heat at a constant fixed temperature of 283°C and the heat...
In a winter season when outside temperature is –1oC, the inside of house is to be...
In a winter season when outside temperature is –1oC, the inside of house is to be maintained at 25oC. Estimate the minimum power required to run the heat pump of maintaining the temperature. Assume heating load as 125 MJ/h. What would be maximum efficiency of engine that      can be had between the temperatures of 1150oC       and 27oC ? 1.A heat engine is supplied with 278 kJ/s of heat at a constant fixed temperature of 283°C and the heat...
Derive an expression for the U factor if the inside and outside surfaces of the tubes...
Derive an expression for the U factor if the inside and outside surfaces of the tubes in a heat exchanger are finned and have fin efficiencies of ?i and ?o on the inside and the outside, and Af,i and Af,o as the finned area on the inside and the outside, respectively, and similarly Au,i and Au,o as the unfinned area on the inside and the outside, respectively. Please post all steps taken. Thanks!
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT