Nernst Equilibrium Equation Problem Use the information in the table below to answer the questions. Ion...
Nernst Equilibrium Equation Problem
Use the information in the table below to answer the questions.
| Ion | ECF | ICF |
|---|---|---|
| X+ | 120 mM | 30 mM |
| A- | 100 mM | 100 mM |
| B- | 140 mM | 30 mM |
a) Calculate the Nernst Equilibrium potential for EACH ion.
b) Which ion(s) have a net chemical force acting to move the ion(s) into the cell?
c) Which ion(s) have a net electrical force acting to move the ion(s) into the cell?
d) If the plasma membrane had a voltage of +30 mV would X+ move into or out of the cell explain why?
Homework Answers
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Nernst Equilibrium Equation Problem
Use the information in the table below to answer the
questions.
Ion...
25. A woman runs a marathon in 30°C weather and replaces all volume lost in sweat by drinking dis...
25. A woman runs a marathon in 30°C weather and replaces all volume lost in sweat by drinking distilled water. After th A) decreased total body water (TBW) B) decreased haematocrit C) decreased intracellular fluid (ICF) volume e marathon, she will have decreased plasma osmolarity increased intracellular osmolarity 26. Which of the following ions has a higher concentration in intracellular fluid (ICF) than in extracellular fluid (ECF)? C1 D) HC03 E) Ca2+ 27. One gram of mannitol was injected into...
Extra Problem for Chapter 9 1. The ion concentrations in the table are representative of those...
Extra Problem for Chapter 9 1. The ion concentrations in the table are representative of those found in mammalian skeletal muscle at 37°C. The resting membrane potential for the skeletal muscle cell is approximately.90 mv. A) Calculate the Nernst potentials for each ion and enter the calculated values in the table. Be sure to show calculations. lon Intracellular Concentration (MM) Extracellular Concentration (MM) Nernst (equilibrium) Potential (mv) 150 145 1.5 120
1. Use the Nernst Equation (Box 3.2, Ch. 3) to determine the equilibrium potential for each...
1. Use the Nernst Equation (Box 3.2, Ch. 3) to determine the equilibrium potential for each of the following ion concentrations. Use 370C for the temperature. K+ 5 mM out 120 mM in 140 mM out 10 mM in Na* 0.1 micromolar in Ca2+ 2 mM out 5 mM in Cl- 150 mM out
1. Use the Nernst Equation (Box 3.2, Ch. 3) to determine the equilibrium potential for each of the following ion concentrations. Use 370C for the temperature....
According to the Nernst equation, the equilibrium potential for any ion, Ejon, distributed across a membrane...
According to the Nernst equation, the equilibrium potential for any ion, Ejon, distributed across a membrane is dependent on the internal, [lon]in, and external, [lon]out, concentrations of the ion (in moles or grams/liter); the valence of the ion, z (an integer); the absolute temperature, K; Faraday's constant, F; and the universal gas constant, R. Eion = ( R ) 2.303 log10 (Ionlout Tomlin If Faraday's constant is approximately 96,500 coulombs/mole, and the equilibrium potential for sodium ions across a skeletal...
for each, what is the right answer? B) iris 19. The Nernst Equation predicts that the...
for each, what is the right answer?
B) iris 19. The Nernst Equation predicts that the equilibrium potential for an ion is proportional to where "in" means "inside the cell" and "out" means "outside the cell" (pick the answer that most closely matches the Nemst equation). A) log ([ion in x [ionout) B) bg ([on]out [onlin) C) log (ionin) D) bg (ion)in Vlog ([ion)out) E) log (ion)in) x log (ionout) 20. The eustachian tube connects the and the A) middle...
You are studying neurons in the lab by growing them in culture (in a petri dish outside the body)
You are studying neurons in the lab by growing them in culture (in a petri dish outside the body). You grow them in an incubator at 37 degrees C. With this experimental setup, you can easily change the extracellular ion concentrations by switching the cell culture medium (the fluid that surrounds the cells).Intracellular concentrationMedium 1 (extracellular concentration)Medium 2 (extracellular concentration)K+140 mM4.5 mM50 mMNa+10 mM135 mM100 mMCl-12 mM125 mM120 mMa.If you switch from Medium 1 to Medium 2, will the intracellular...
please write thorough answers thanks PART 1 Answer ONLY ONE of the following TWO questions of...
please write thorough answers thanks
PART 1 Answer ONLY ONE of the following TWO questions of Part 1 ie a) OR b) a) A typical, healthy nerve cell in the body has intracellular and extracellular Na, K and Cl' concentrations as shown below. Na concentration: Extracellular: = 150 mm K concentration: Extracellular: = 4 mm Ci concentration: Extracellular: = 100 mm Temperature = 37°C (303.3K) R (the Universal Gas constant) = 8.315 VCmol'k F (Faraday's constant) = 96,485 Cmol Intracellular:...
SHOW YOUR WORK, PLEASE WRITE LEDGIBLY AND CLEARLY 1. Patch clamp recording of a single ion...
SHOW YOUR WORK, PLEASE WRITE LEDGIBLY AND CLEARLY 1. Patch clamp recording of a single ion channel yields the following results: Holding Potential Measured Current (mV) 100 50 (pA) 1.0 0.0 +50 +100 +2.0 +3.0 A) Draw a graph of the current (on the vertical axis)-voltage relation for this channel. B) What is the electrical resistance (in ohms) of this channel? (keep in mind mVa 103 volts, pA 101 amperes, and an ohm is a derived unit that is equivalent...
please answer question 8-13 This is the prior information: Nerve impulses are electrical currents in the...
please answer question 8-13
This is the prior information: Nerve impulses are electrical
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properties of the axon are important to understand in order to
understand the flow of electrical impulses. In this test, you will
explore the capacitance and resistivity of an axon of a nerve cell.
For this test, the axon will be treated as a CYLINDER of arbitrary
length “L” and radius “a” that is filled with a...
***I need help on PART E of this problem. All of the information is given on...
***I need help on PART E of
this problem. All of the information is given on the worksheet
along with the hints on each part. Thank you!
The post-synaptic cell at a chemical synapse has the following distribution of ions between the cytosol and the extracellular environment. Consider that the relative permeabilities for Na, K and Cl' are 1, 100 and 50, and that there are no other significant permeabilities, lon Concentration (in mM) Extracellular Equilibrium potential mV) Intracellular 146...
25. A woman runs a marathon in 30°C weather and replaces all volume lost in sweat by drinking distilled water. After th A) decreased total body water (TBW) B) decreased haematocrit C) decreased intracellular fluid (ICF) volume e marathon, she will have decreased plasma osmolarity increased intracellular osmolarity 26. Which of the following ions has a higher concentration in intracellular fluid (ICF) than in extracellular fluid (ECF)? C1 D) HC03 E) Ca2+ 27. One gram of mannitol was injected into...
Extra Problem for Chapter 9 1. The ion concentrations in the table are representative of those found in mammalian skeletal muscle at 37°C. The resting membrane potential for the skeletal muscle cell is approximately.90 mv. A) Calculate the Nernst potentials for each ion and enter the calculated values in the table. Be sure to show calculations. lon Intracellular Concentration (MM) Extracellular Concentration (MM) Nernst (equilibrium) Potential (mv) 150 145 1.5 120
1. Use the Nernst Equation (Box 3.2, Ch. 3) to determine the equilibrium potential for each of the following ion concentrations. Use 370C for the temperature. K+ 5 mM out 120 mM in 140 mM out 10 mM in Na* 0.1 micromolar in Ca2+ 2 mM out 5 mM in Cl- 150 mM out
1. Use the Nernst Equation (Box 3.2, Ch. 3) to determine the equilibrium potential for each of the following ion concentrations. Use 370C for the temperature....
According to the Nernst equation, the equilibrium potential for any ion, Ejon, distributed across a membrane is dependent on the internal, [lon]in, and external, [lon]out, concentrations of the ion (in moles or grams/liter); the valence of the ion, z (an integer); the absolute temperature, K; Faraday's constant, F; and the universal gas constant, R. Eion = ( R ) 2.303 log10 (Ionlout Tomlin If Faraday's constant is approximately 96,500 coulombs/mole, and the equilibrium potential for sodium ions across a skeletal...
for each, what is the right answer?
B) iris 19. The Nernst Equation predicts that the equilibrium potential for an ion is proportional to where "in" means "inside the cell" and "out" means "outside the cell" (pick the answer that most closely matches the Nemst equation). A) log ([ion in x [ionout) B) bg ([on]out [onlin) C) log (ionin) D) bg (ion)in Vlog ([ion)out) E) log (ion)in) x log (ionout) 20. The eustachian tube connects the and the A) middle...
please write thorough answers thanks
PART 1 Answer ONLY ONE of the following TWO questions of Part 1 ie a) OR b) a) A typical, healthy nerve cell in the body has intracellular and extracellular Na, K and Cl' concentrations as shown below. Na concentration: Extracellular: = 150 mm K concentration: Extracellular: = 4 mm Ci concentration: Extracellular: = 100 mm Temperature = 37°C (303.3K) R (the Universal Gas constant) = 8.315 VCmol'k F (Faraday's constant) = 96,485 Cmol Intracellular:...
SHOW YOUR WORK, PLEASE WRITE LEDGIBLY AND CLEARLY 1. Patch clamp recording of a single ion channel yields the following results: Holding Potential Measured Current (mV) 100 50 (pA) 1.0 0.0 +50 +100 +2.0 +3.0 A) Draw a graph of the current (on the vertical axis)-voltage relation for this channel. B) What is the electrical resistance (in ohms) of this channel? (keep in mind mVa 103 volts, pA 101 amperes, and an ohm is a derived unit that is equivalent...
please answer question 8-13
This is the prior information: Nerve impulses are electrical
currents in the form of “ionic flows.” Therefore the electrical
properties of the axon are important to understand in order to
understand the flow of electrical impulses. In this test, you will
explore the capacitance and resistivity of an axon of a nerve cell.
For this test, the axon will be treated as a CYLINDER of arbitrary
length “L” and radius “a” that is filled with a...
***I need help on PART E of
this problem. All of the information is given on the worksheet
along with the hints on each part. Thank you!
The post-synaptic cell at a chemical synapse has the following distribution of ions between the cytosol and the extracellular environment. Consider that the relative permeabilities for Na, K and Cl' are 1, 100 and 50, and that there are no other significant permeabilities, lon Concentration (in mM) Extracellular Equilibrium potential mV) Intracellular 146...
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