Use the following table to answer the questions Ion Extracellular Concentration (mM) Intracellular Concentration (mM) Na+ 440 50 K+ 20 400 Cl- 560 52 Ca++ 10 1 Calculate the equilibrium potential for...

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Medical Sciences

Use the following table to answer thequestions
Ion
Extracellular Concentration (mM)
Intracellular Concentration (mM)
Na+
440
50
K+
20
400
Cl-
560
52
Ca++
10
1
Calculate the equilibrium potential for Na+, K+, Ca++, and Cl-ions? (4 points)
If the resting membrane potential is -65, give the direction ofthe flow of Na+, Ca++, K+, and Cl- ion. (4 points)
What will happen to the Cl- equilibrium potential, if onechanges the extracellular chloride concentration from 560 mM to 100mM? Give the direction of Cl- flow. (2 points)

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4.3 Ratings (1063 Votes)

AIt can be calculated using the Nernst equation Eeq Na RTzF ln Nao Nai EeqNa is the equilibrium potential for Sodium measured in volts R is the universal gas constant equal to 8314 joulesK1mol1 T is the absolute temperature measured in kelvins K degrees Celsius 27315 For Normal body temperature 37C T 31015K z is the number of elementary charges of the ion in question involved in the reaction F is the See Answer

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Ion	Extracellular Concentration (mM)	Intracellular Concentration (mM)
Na+	440	50
K+	20	400
Cl-	560	52
Ca++	10	1