Question

Calculate the Nernst Potential generated across a cell membrane that is selectively permeable to K+. Temperature...

Calculate the Nernst Potential generated across a cell membrane that is selectively permeable to K+. Temperature 27 deg C. K+ out = 62 mM. K+ in = 243 mM. Your answer must be expressed in mV (to the nearest mV) and you must include the units.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Use the Nernst equation to calculate the membrane potential (in mV) for Ca(2+) if the concentration...
Use the Nernst equation to calculate the membrane potential (in mV) for Ca(2+) if the concentration of Ca(2+) inside the cell is 5mM and outside the concentration of Ca(2+) is 140mM. You should do this calculation at body temperature, 37C (310K).
A cell’s membrane is permeable to K+, Na+, and Cl─.    Use the following information to determine...
A cell’s membrane is permeable to K+, Na+, and Cl─.    Use the following information to determine the equilibrium potential of this cell.    Assume that the cell is at 37º C. K+ Na+ Cl─ Permeability (m/s) 100 1 1000 Outside Concentration (mM) 4.5 145 116 Inside Concentration (mM) 150 12 4.2             [mM = 0.001 Moles / liter.] 70.0     mV -14.3 mV -60.5 mV -88.3 mV
In a two-compartment model of a cell with a K+- and Na+-permeable membrane and a 10-fold...
In a two-compartment model of a cell with a K+- and Na+-permeable membrane and a 10-fold excess of K+ in the inside compartment, how would the membrane potential change if all K+ ions were replaced by Na+ ions? a. It would double. b. It would be reduced by half. c. It would not change. d. It would become positive. e. No potential would be generated.
Ions A and B in the Table below are both monovalent cations associated with a cell...
Ions A and B in the Table below are both monovalent cations associated with a cell with a membrane potential of -98 mV. Constants you may need to answer the questions associated with the Table are as follows: R = 0.002 kcal/mol o;     T = 310o;     F = 0.023 kcal/mol mV Ion ICF (mM) ECF (mM) A 14.5 96.8 B 105.6 3.2 What is Ion A’s equilibrium potential? (round to nearest whole number and give units) 2. What is the...
Ions A and B in the Table below are both monovalent cations associated with a cell...
Ions A and B in the Table below are both monovalent cations associated with a cell with a membrane potential of -98 mV. Constants you may need to answer the questions associated with the Table are as follows: R = 0.002 kcal/mol o;     T = 310o;     F = 0.023 kcal/mol mV Ion ICF (mM) ECF (mM) A 14.5 96.8 B 105.6 3.2 What is Ion A’s equilibrium potential? (round to nearest whole number and give units) _______________________________ What is the...
A typical cell has a membrane potential of -70 mV, meaning that the potential inside the...
A typical cell has a membrane potential of -70 mV, meaning that the potential inside the cell is 70 mV less than the potential outside due to a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outer surface. This effectively makes the cell wall a charged capacitor. Because a cell's diameter is much larger than the wall thickness, it is reasonable to ignore the curvature of the cell...
The Table lists initial solute concentrations across a 100 MWCO dialysis membrane. Answer the questions below...
The Table lists initial solute concentrations across a 100 MWCO dialysis membrane. Answer the questions below the table for the condition that would occur when the system reaches equilibrium. Constants you will need are as follows: R=0.082 L atm/mol K; T=310 K Solution A Solution B 2.0 mM CaCl2 4.0 mM Albumin 2.5 mM Glucose 4.0 mM Glucose 3.0 mM NaCl 2.0 mM Urea 1.5 mM Albumin 3.0 mM Urea What is the osmotic pressure (in mmHg) exerted by Solution...
The net charge difference across the membrane, just like the charge difference across the plates of...
The net charge difference across the membrane, just like the charge difference across the plates of a capacitor, is what leads to the voltage across the membrane. How much excess charge (in picocoulombs, where 1 pc = 1x10-12 C) must lie on either side of the membrane of an axon of length 2 cm to provide this potential difference (0.07 V) across the membrane? You may consider that a net positive charge with this value lies just outside the axon...
Diffusion of gases across a permeable membrane 1. How long did it take the O2 levels...
Diffusion of gases across a permeable membrane 1. How long did it take the O2 levels to become about equal outside and inside the cell? What happened to those levels after they became about equal over the additional 10 seconds? Why did this happen? My answer: It took 6 seconds to become equal. After they became about equal over the additional 10 seconds they fluctuate back and forth as equal equilibrium is achieved. 2.Cell use O2 and produce CO2 as...
± Cell Potential and Free Energy Free-energy change, ΔG∘, is related to cell potential, E∘, by...
± Cell Potential and Free Energy Free-energy change, ΔG∘, is related to cell potential, E∘, by the equation ΔG∘=−nFE∘ where n is the number of moles of electrons transferred and F=96,500C/(mol e−) is the Faraday constant. When E∘ is measured in volts, ΔG∘ must be in joules since 1 J=1 C⋅V. Part A Calculate the standard free-energy change at 25 ∘C for the following reaction: Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) Express your answer to three significant figures and include the appropriate units. Part B...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT