Patch clamp recording of a single ion channel yields the following results: Holding Potential (mV) Measured Current (pA) -100 -1.0 -50 0.0 0 +1.0 +50 +2.0 +100 +3.0 Part a. What is the equilibrium potential for ion X+1? a.) 0 mv b.)+55 mv c.)-50 mv d.) -60 mv e.) -75 mv Part b. Is ion X+1 in higher concentration inside or outside the cell? a.) inside b.) outside Part c. Calculate the membrane potential at the instant when a neuron has the following relative permeabilities: PK+ = 1.0, PNa+ = 1.0, PCl- = 1.0. Use the ionic concentration values in the picture included. a.) -12 mv b.) -35mv c.) -60 mv d.) +20 mv e.) 0 mv
Patch clamp recording of a single ion channel yields the following results: Holding Potential (mV) Measured Current (pA) -100 -1.0 -50 0.0 0 +1.0 +50 +2.0 +100 +3.0 Part a. What is the equilibrium potential for ion X+1? a.) 0 mv b.)+55 mv c.)-50 mv d.) -60 mv e.) -75 mv Part b. Is ion X+1 in higher concentration inside or outside the cell? a.) inside b.) outside Part c. Calculate the membrane potential at the instant when a neuron has the following relative permeabilities: PK+ = 1.0, PNa+ = 1.0, PCl- = 1.0. Use the ionic concentration values in the picture included. a.) -12 mv b.) -35mv c.) -60 mv d.) +20 mv e.) 0 mv
Chapter4: Management Practices For Finfish
Section: Chapter Questions
Problem 23SA
Related questions
Question
Patch clamp recording of a single ion channel yields the following results:
|
Holding Potential (mV) |
Measured Current (pA) |
|
-100 |
-1.0 |
|
-50 |
0.0 |
|
0 |
+1.0 |
|
+50 |
+2.0 |
|
+100 |
+3.0 |
Part a.
What is the equilibrium potential for ion X+1?
a.) 0 mv
b.)+55 mv
c.)-50 mv
d.) -60 mv
e.) -75 mv
Part b.
Is ion X+1 in higher concentration inside or outside the cell?
a.) inside
b.) outside
Part c.
Calculate the membrane potential at the instant when a neuron has the following relative permeabilities: PK+ = 1.0, PNa+ = 1.0, PCl- = 1.0. Use the ionic concentration values in the picture included.
a.) -12 mv
b.) -35mv
c.) -60 mv
d.) +20 mv
e.) 0 mv
Transcribed Image Text:lon concentration gradients
Na
cr)
(Cr)
K*
A
Na
Na
A
K*
(Cr
(cr
(Cr)
Na Na (Cr)
A
+
K*
K*
A
Cr
Nat
(Cr)
Na
Na СГ
A
K+
A
+
K*
K+
Na
A
Na
K*
K*
(Cr) Na
A A
K*
(СГ
(Cr)
A
A
Na
(Cr)
K*
K+
A
СГ
Na
Na (Cr)
(A)
Na
(Cr
A) K
K+
K™
A
A
(Cr)
Na
Na
A
K
K
extracellular
sodium (Na*): 144 mM
chloride (CI): 144 mM
potassium (K*): 5 mM
calcium (Ca): 1 mM
inorganic anions (A¹): 0 mM
intracellular
potassium (K): 100 mM
organic anions (A¹): 100 mM
sodium (Na): 16 mM
chloride (CI¯¹): 13 mM
calcium (Ca¹2): 0.0001 mM
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