a. What is the equilibrium potential of K+? Assume 10mM, 100mM intracellular. Show calculations b. What...
a. What is the equilibrium potential of K+? Assume 10mM, 100mM intracellular. Show calculations
b. What is the equilibrium potential of Na+? use 100 mM intracellular. Show calculations
c. If Nat+ permeability increased so that it is much greater than K+ permeability what would the effect be on the resting membrane potential? Assume for this cell that the resting potential membrane potential is -60mV. Use precise and prober ply labeled graph to show direct
Homework Answers
Membrane potential generally lie in the range of -40 mv to -80mv.
A) potential of K+ is -84 mv with 5mM potassium outside and 140 mM outside.
B) equilibrium potential of Na+ is +66 mv with approximately 12mM sodium inside and 140 mM outside.
C)in that case the sodium ion on the outside of membrane will more rush to intracellular space and and the potential will increase.
Add Answer to:
a. What is the equilibrium potential of K+? Assume 10mM, 100mM
intracellular. Show calculations
b. What...
on 10 of 11 What is the equilibrium membrane potential due to Nat ions if the...
on 10 of 11 What is the equilibrium membrane potential due to Nat ions if the extracellular concentration of Nat ions is 138 mM and the intracellular concentration of Na ions is 33 mM at 20 C? equilibrium membrane potential: mV
*** I need help with PART F of this problem. Hints are given in other parts...
*** I need help with PART F of
this problem. Hints are given in other parts of the problem and all
information available is given on the worksheet. Please help, 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...
***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...
Please show all work 10. Suppose point A is 0.4m from point B. a. What is...
Please show all work
10. Suppose point A is 0.4m from point B. a. What is the conduction time required for an action potential to travel this distance if a single neuron spans this distance and has a conduction velocity is 60m/sec? b. What is the conduction yelocity if the pathway consists of three neurons, two synapses and the synaptic delay is 1 msec? 11. Ohm's Law describes the movement of ions across a membrane: I-G(Vm-E). I is the current...
What is the membrane potential (Vm) if the permeability of Calcium is raised to 60? Consider...
What is the membrane potential (Vm) if the permeability of
Calcium is raised to 60?
Consider this cell. Use this information to answer the following questions. IN OUT Relative Permeability [Na+]mM 0.05 10 100 [K+]mM 1.0 [CI]mM 0.05 [Ca++]mM 0.001 0.00001 [A-]mM 105
Question 1. The following questions are based on the information below, from a mutated nerve cell...
Question 1. The following questions are based on the information below, from a mutated nerve cell in the brain: I nterstitial fluid intracellular fluid Na+ 5mM 180mM K+ 15mM 100mM Ca2+ 300mM 6mM Cl- 105mM 15mM 1) Calculate the equilibrium potentials for each ion. 2) From those values, predict the transport mechanism for each ion. 3) Which two ions are involved in establishing the resting potential? 4) Of those two ions, which has the greater permeability? 5) Which ion is...
please explain steps and show work no pictures were provided. table 3.13 is given above. 3.46...
please explain steps and show work
no pictures were provided. table 3.13 is given above.
3.46 The cell membrane is covered with protein complexes called Na-K+ pumps. Each pump moves 3 Nations from the intracellular space to the extracellular milieu for every 2 K ions it moves into the cell. During normal function, the pumps work constantly. Under normal conditions, there is a gradient of Nat and K ions between the cell and the extracellular space; the concentrations of these...
1. If the membrane potential of sodium ions in a cell is equal to +60 mV,...
1. If the membrane potential of sodium ions in a cell is equal to +60 mV, what is its membrane potential for chloride ions if they are found in the exact same concentrations as sodium? Give your answer in mV. 2. Given a cell membrane with the following parameters- Ion Extracellular concentration (mmol/L) Intracellular concentration (mmol/L) Permeability K+ 10 150 1 Na+ 140 15 0.04 Cl- 100 7 0.45 calculate the membrane potential of the cell in mV. (Round your...
2. Neuron during an action potential: a. What triggers the first action potential (which ion)? b....
2. Neuron during an action potential: a. What triggers the first action potential (which ion)? b. What is the typical threshold potential of a neuron? c. The calculated equilibrium potential of Na+ (EN) is approx. +60mV (calculated). Explain how this is related to the rising phase of an action potential (depolarization). d. The calculated equilibrium potential of K+ (EK) is approx. -90mV. Explain how this is related to the falling phase (repolarization). e. Direction of Nation movement (influx/efflux). f. Direction...
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:...
on 10 of 11 What is the equilibrium membrane potential due to Nat ions if the extracellular concentration of Nat ions is 138 mM and the intracellular concentration of Na ions is 33 mM at 20 C? equilibrium membrane potential: mV
*** I need help with PART F of
this problem. Hints are given in other parts of the problem and all
information available is given on the worksheet. Please help, 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...
***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...
Please show all work
10. Suppose point A is 0.4m from point B. a. What is the conduction time required for an action potential to travel this distance if a single neuron spans this distance and has a conduction velocity is 60m/sec? b. What is the conduction yelocity if the pathway consists of three neurons, two synapses and the synaptic delay is 1 msec? 11. Ohm's Law describes the movement of ions across a membrane: I-G(Vm-E). I is the current...
What is the membrane potential (Vm) if the permeability of
Calcium is raised to 60?
Consider this cell. Use this information to answer the following questions. IN OUT Relative Permeability [Na+]mM 0.05 10 100 [K+]mM 1.0 [CI]mM 0.05 [Ca++]mM 0.001 0.00001 [A-]mM 105
please explain steps and show work
no pictures were provided. table 3.13 is given above.
3.46 The cell membrane is covered with protein complexes called Na-K+ pumps. Each pump moves 3 Nations from the intracellular space to the extracellular milieu for every 2 K ions it moves into the cell. During normal function, the pumps work constantly. Under normal conditions, there is a gradient of Nat and K ions between the cell and the extracellular space; the concentrations of these...
2. Neuron during an action potential: a. What triggers the first action potential (which ion)? b. What is the typical threshold potential of a neuron? c. The calculated equilibrium potential of Na+ (EN) is approx. +60mV (calculated). Explain how this is related to the rising phase of an action potential (depolarization). d. The calculated equilibrium potential of K+ (EK) is approx. -90mV. Explain how this is related to the falling phase (repolarization). e. Direction of Nation movement (influx/efflux). f. Direction...
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:...
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