Help answers Increasing the intracellular K+ concentration will cause the resting membrane potential to: Group of...
Help answers
Increasing the intracellular K+ concentration will cause the resting membrane potential to:
Group of answer choices
not change.
depolarize.
hyperpolarize.
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Increasing the intracellular K+ concentration will cause the
resting membrane potential to:
Group of...
The ratio between extracellular and intracellular K+ concentration A) will cause depolarisation of resting membrane potential...
The ratio between extracellular and intracellular K+ concentration A) will cause depolarisation of resting membrane potential if extracellular K+ concentration decreases B) has little effect on neuronal resting membrane potential C) is the main factor controlling neuronal resting membrane potential D) is able to vary freely in brain tissue E) will cause hyperpolarisation of resting membrane potential if intracellular K+ concentration increases Please explain the answer! Thankyou :)
A cell has a resting membrane potential of -70mV. In each of the following cases, would...
A cell has a resting membrane potential of -70mV. In each of the following cases, would the cell depolarize, or hyperpolarize? Justify your answers with a written explanation that relates to the GHK equation; you do not need to calculate new membrane potentials, but you should explain why the changes would occur. Hint: Use the simulations from class to solve these Cell becomes more permeable to Cl- Cell becomes more permeable to Ca++ (Hint: which ion shown in the simulation...
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
2. Hypokalemia of the interstitial fluid and plasma has which of the following effects on an...
2. Hypokalemia of the interstitial fluid and plasma has which of the following effects on an excitable cell such as muscle or nerve (Circle one answer from each grouping on three choices) (10 Points) A. The cell is more likely to Depolarize B. The cell is more likely to Hyperpolarize C. The cell is no more likely either to Depolarize or Hyperpolarize D. The cell's resting membrane potential is less negative E. The cell's resting membrane potential is more negative...
Changes in K+ ion concentrations are often dangerous. Simply doubling the concentration of K+ in the...
Changes in K+ ion concentrations are often dangerous. Simply doubling the concentration of K+ in the extracellular fluid, can lead to death. Which of the following choices correctly explains why deviations in K+ concentrations can be lethal? Select one: a. Excess K+ in the ECF diminishes the electrochemical gradient for K+ to leak out of the cell. As fewerk leave the cell, the resting membrane potential become more positive and is more likely to depolarize. b. Excess K+ in the...
Question 8 1 pts In living cells, which of the following manipulations would cause the resting...
Question 8 1 pts In living cells, which of the following manipulations would cause the resting membrane potential (i.e. Erest) of a living neuron to become more electronegative? Decreasing the threshold of a neuron Increasing the number of opened K+ leak channels in the plasma membrane Decreasing the ICF/cytoplasmic K* concentration Decreasing the number of voltage-gated Nat channels Decreasing the activity of the Nat/K* ATPase
1. Consider a typical cell at its resting membrane potential (rest Vm). The membrane temporarily becomes...
1. Consider a typical cell at its resting membrane potential
(rest Vm). The membrane temporarily becomes more permeable to Na+.
Ena = +55mV, resting Vm = -60mV How would the change in membrane be
represented in a graph of Vm vs. time?
a. no change b. Graph B c. Graph
C
Please explain why the right answer is correct and why the wrong
answers are incorrect.
In dog skeletal muscle, the extracellular and intracellular concentration of Na+ are 150 mM and 12...
In dog skeletal muscle, the extracellular and intracellular concentration of Na+ are 150 mM and 12 mM, and those of K+ are 2.7 mM and 140 mM, respectively. Calculate the total free energy change as 3 Na+ are transported out and 2 K+ are transported in by the Na+-K+ pump. Assume that the temperature is 25°C and the membrane potential is –60 mV. Give your answer in kJ/mol to 1 decimal place.
A model cell contains the intracellular ions Na+, K+, Cl-, and An- (impermeant anions) and the...
A model cell contains the intracellular ions Na+, K+, Cl-, and An- (impermeant anions) and the extracellular ions Na+, K+, and Cl-. The concentration (activities) of [Na+]o=125 mmol l-1, [K+]o = 5 mmol l-1, whereas [An-]i = 123 mmol l-1, [K+]i= 112 mmol l-1. Assume the membrane is permeable to Na+, K+, and Cl-. [ The subscripts i and o refer to inside and outside, respectively]. The relative permeabilities for the ions are pNa/pK=0.02, pCl/pK=0.1 a) What are the values...
Suppose that an artificial non-gated K+ channel could beinserted into the plasma membrane of an axon...
Suppose that an artificial non-gated K+ channel could
beinserted into the plasma membrane of an axon at resting
potential(membrane potential = -70 mV). Assume that the axon has
notrecently produced an action potential.
Answer questions 1-4 by selecting only from the
threeanswer choices to the left of each question. Drag the
correctanswer to the right of each question.
Suppose that an artificial non-gated K+ channel could beinserted into the plasma membrane of an axon at resting potential(membrane potential = -70...
2. Hypokalemia of the interstitial fluid and plasma has which of the following effects on an excitable cell such as muscle or nerve (Circle one answer from each grouping on three choices) (10 Points) A. The cell is more likely to Depolarize B. The cell is more likely to Hyperpolarize C. The cell is no more likely either to Depolarize or Hyperpolarize D. The cell's resting membrane potential is less negative E. The cell's resting membrane potential is more negative...
Changes in K+ ion concentrations are often dangerous. Simply doubling the concentration of K+ in the extracellular fluid, can lead to death. Which of the following choices correctly explains why deviations in K+ concentrations can be lethal? Select one: a. Excess K+ in the ECF diminishes the electrochemical gradient for K+ to leak out of the cell. As fewerk leave the cell, the resting membrane potential become more positive and is more likely to depolarize. b. Excess K+ in the...
Question 8 1 pts In living cells, which of the following manipulations would cause the resting membrane potential (i.e. Erest) of a living neuron to become more electronegative? Decreasing the threshold of a neuron Increasing the number of opened K+ leak channels in the plasma membrane Decreasing the ICF/cytoplasmic K* concentration Decreasing the number of voltage-gated Nat channels Decreasing the activity of the Nat/K* ATPase
1. Consider a typical cell at its resting membrane potential
(rest Vm). The membrane temporarily becomes more permeable to Na+.
Ena = +55mV, resting Vm = -60mV How would the change in membrane be
represented in a graph of Vm vs. time?
a. no change b. Graph B c. Graph
C
Please explain why the right answer is correct and why the wrong
answers are incorrect.
Suppose that an artificial non-gated K+ channel could
beinserted into the plasma membrane of an axon at resting
potential(membrane potential = -70 mV). Assume that the axon has
notrecently produced an action potential.
Answer questions 1-4 by selecting only from the
threeanswer choices to the left of each question. Drag the
correctanswer to the right of each question.
Suppose that an artificial non-gated K+ channel could beinserted into the plasma membrane of an axon at resting potential(membrane potential = -70...
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