Q5.8. In a neuron with a Vm of 0, there is a high concentration of K* inside of the cell and a low concentration outside. Which statement below is TRUE? If K* channels were open and the electrical forces were absent, diffusion would result in a net movement of K* out of the cell. If K+ channels were closed, Na* would flow into the neuron. If K* channels were open and the effect of diffusion was absent, the electrical forces would move K+ out of the cell. The membrane potential would be at the K* equilibrium potential, because concentrations of K+ are not balanced. Submit

Q5.8. In a neuron with a Vm of 0, there is a high concentration of K* inside of the cell and a low concentration outside. Which statement below is TRUE? If K* channels were open and the electrical forces were absent, diffusion would result in a net movement of K* out of the cell. If K+ channels were closed, Na* would flow into the neuron. If K* channels were open and the effect of diffusion was absent, the electrical forces would move K+ out of the cell. The membrane potential would be at the K* equilibrium potential, because concentrations of K+ are not balanced. Submit

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter39: Information Flow And The Neuron

Section: Chapter Questions

Problem 5TYK: The major role of the Na+/K+ pump is to: a. cause a rapid firing of the action potential so the...

See similar textbooks

Related questions

Q: 1. Shown below are figures of the closed and open structures of the voltage gated potassium channel…

A: Introduction Voltage-gated potassium ion channels (Kv) are involved in a number of cellular…

Q: Separately, draw a table using arrows to depict the appropriate magnitude and direction of the…

A: Ion influxes at membrane potentials refer to the movement of ions across the cell membrane in…

Q: The sodium-potassium pump generates the following concentration gradients across the plasma…

A: Membrane potential also called transmembrane potential or membrane voltage is difference in electric…

Q: Identify the stages involved during the changes in membrane potential of the neuron represented in…

A: Nervous system is an important system which helps in maintaining the homeostasis of the human body.…

Q: Batrachotoxin (BTX) is a steroidal alkaloid from the skin of Phyllobates terribilis , a poisonous…

A: The membrane exhibits different ion channels, which open and closed based on the signaling process.

Q: 8. How is the Nat channel different from the Na+/K ATPase? Which of the diffusion and which one is…

A: The movement of any substance from its lower concentration towards its higher concentration that is…

Q: A loss-of-function mutation in the ion channel responsible for the generation of end-plate…

A: Introduction:- Mutation is defined as the heritable changes in the genetic material of an organism.…

Q: The resting membrane potential is established by? The Na+/K+-ATPase pumping Na+ into the cell and…

A: Introduction Resting membrane potential is the electrical charge difference that exists across the…

Q: The three types of neurons in the nervous system of humans are O synaptic neurons, motor neurons,…

A: Neuron Also known as nerve cell. It is an electrically excitable cell that processes and transmits…

Q: Part C- Comparing and Contrasting the Two Types of Voltage-Gated lon Channels Sort the phrases into…

A: We can say that The cell is covered with a membrane, that is known as the plasma membrane. This…

Q: The normal concentrations for intracellular and extracellular potassium in a neuron are [K+]in = 150…

A: Recall that the Nernst equation for calculating reversal potential is: Eion = RT/Zf log [Co]/[Ci]…

Q: What is the intracellular voltage for Cl- if the intracellular concentration was 5 mM and the…

A: The Nernst equation enables the calculation of the potential that will be established across the…

Q: Two scientists calculated the membrane potential of a neuron using two different equations, the…

A: The membrane potential is the difference in electrical charge between the inside and outside of a…

Q: What is the equilibrium membrane potential due to Na+ ions if the extracellular concentration of Na+…

A: The fluids present in the internal and external environment of the cell consist presence of several…

Q: what would the membrane potential be if the membrane became 10X more permeable to both sodium and…

A: When the membrane becomes 10 times more permeable to sodium (Na⁺) and chloride (Cl⁻) ions:Sodium…

Q: Why is the resting membrane potential negative? Shouldn't it be positive as cells move in and out…

A: The difference in voltage or charge across the cell membrane when the cell is at rest or when the…

Q: How does the movement of ICF K+ ions down its concentration gradient affect membrane potential?

A: In a biological cell, the difference in electric potential between inside and outside is called…

Q: Q4.6. If calcium ions, each of which has a charge of +2 (Ca2*), moved OUT OF a neuron, and no other…

A: The Charge of the ion depends on the type of charge present on the moving ion. The Concentration…

Q: D4

A: Membrane transport proteins, which are specialized to varying degrees in the transport of certain…

Q: Why is the sodium-potassium pump indirectly important to the ac-tion potential and to maintaining…

A: The sodium and potassium particles are pumped in inverse ways over the layer. This pump manufacture…

Q: 22- For EPSP, which is the most important ion flow: A. Sodium ions diffuse out of the cell. C.…

A: EPSP stands for excitatory postsynaptic potential.It is involved in the firing of the action…

Q: But how would I find the number for the membrane potential after it becomes more permeable? Is there…

A: The resting membrane potential of a cell is approximately -70 millivolts (mV). Sodium ions (Na⁺)…

Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

Q5.8. In a neuron with a Vm of 0, there is a high concentration of K* inside of the cell and a low
concentration outside. Which statement below is TRUE?
If K+ channels were open and the electrical forces were absent, diffusion would result in a net
movement of K* out of the cell.
If K+ channels were closed, Na* would flow into the neuron.
If K+ channels were open and the effect of diffusion was absent, the electrical forces would move K+
out of the cell.
The membrane potential would be at the K* equilibrium potential, because concentrations of K* are
not balanced.
Submit

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.

Similar questions

Discuss the importance of threshold. How does this relate to the concept of APs being all or none? Can I get help on this specific question?
The extracellular concentration of Cl-Cl¯ is 123 mM and the intracellular concentration is 4 mM. In which direction does Cl-CI¯| flow through an open channel when the membrane potential is in the -60 mV-60 mV to +30 mV+30 mV range?
The options for all 8 are either: Depolarization, Na+ influx into cell Vm=-70mV inactivation of voltage-gated Na+ channels and opening of voltage-gated K+ channels Vm = -55mV, voltage Gated Na+ channels open graded potentials stimulating depolarization at the axon hillock hyperpolarization Repolarization, K+ efflux out of cell cells return to resting membrane potential
5 A Which of the following choices correctly fills in the blanks? After repolarization, the sodium ions are found neuron. This reversal of ions can be fixed by the action of E potassium ions are brought in. Select one: outside b. A A inside Oc Od. A outside A inside В inside B outside B inside B outside voltage gated channels two C D C D C D Na/K* exchange pump two Na/K* exchange pump three two the neuron and the potassium ions are found B of the D sodium ions are taken out and D E three E E three E voltage gated channels three two
Which of the following BEST explains the inside negative potential in resting neurons? sodium flows down its electrochemical gradient through sodium-selective channels that are open in resting neurons membrane transporters produce a large sodium concentration gradient by selectively accumulating sodium ions outside the cell the membrane of a resting neuron is more permeable to potassium ions than to other ions present a larger concentration of chloride ions are found inside the cell making the inside of the cell more negative compared to the outside of the cell
A neuron has a resting membrane potential of -70 milivolts (mV) and a threshold value of -55 mV. Three synapses on the body of this neuron receive the impulses listed below. hyperpolarisation by 5 mV • depolarisation by 15 mV • depolarisation by 10 mV ENTER THE MEMBRANE POTENTIAL AS A NUMBER WITH + OR - IN FRONT OF IT. The final membrane potential will be mV and this cause an action potential becasue it is v than the
Plz answer correctly ASAP
D4
Use the Goldman Equation to calculate the resting membrane potential at 37°C for each case:
What effect does an increase or a decrease in extracellularK+ concentration have on resting membrane potential?
If the equilibrium potential for K* is -90mV, and the charge inside the cell is -70mV, which direction will K move across the membrane assuming there is permeability (membrane leak channels) which allow it to pass?
If the Cl- concentrations inside and outside of a neuron are 100 and 10 mM, respectively and the membrane potential is 30 mV, what would be the driving force on Cl- ions? Will chloride enter or exit the cell? Assume that the membrane is highly permeable to chloride. O a. 61 mV; enter O b. -41 mV; enter c. -31mV; exit O d. 91 mV; enter Ое. -82.8 mV; enter