How do potassium ions travel as they move into the cell?A.Up the concentration gradient and up the membrane potentialB.Down the concentration gradient and up the membrane potentialC.Up the concentration gradient and down the membrane potentialD.Down the concentration gradient and down the membrane potential Ans: C

How do potassium ions travel as they move into the cell?A.Up the concentration gradient and up the membrane potentialB.Down the concentration gradient and up the membrane potentialC.Up the concentration gradient and down the membrane potentialD.Down the concentration gradient and down the membrane potential Ans: C

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 2TAHL: Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of...

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Similar questions

Comment on the role of the sodium-potassium pump in maintaining a cell’s resting membrane potential.
Which best defines depolarization? A. At first polarity is reversed the continues until the potential difference across the membrane is eliminated. B.None C.It reestablishes the resting potential. D. At first eliminates the potential difference across the membrane then continues until the polarity is actually reversed.
Draw a sketch of a graph showing a complex AHP consisting of a first component AHP, an ADP, and a second component AHP before repolarization to resting membrane potential
The resting membrane potential is established by? The Na+/K+-ATPase pumping Na+ into the cell and K+ out of the cell The Na+/K+-ATPase pumping K+ into the cell and Na+ out of the cell A larger diffusion of K+ out of the cell compared to diffusion of Na+ into the cell A larger diffusion of K+ into the cell compared to diffusion of Na+ out of the cell a) and d) b) and c)
In considering the diffusion of ions through an ion channel, which driving force/forces must be considered?a. the ion concentration gradientb. the electrical gradientc. osmosisd. facilitated diffusione. both a and b
Finally, what will be the effect on the membrane potential if K+ loan move out of the cell?a) K+ will bring the membrane potential to 0 (neutral) b) The membrane potential won't be significantly affected (non-polarizing) c) K+ leaving will make the inside of the cell more negative (hyperpolarizing) d) K+ will make the inside of the cell more positive (depolarizing)
Which of the following contribute(s) to the resting membrane potential?a. the relative leakiness of the membrane to Na+ and K+b. active transport of ions across the membranec. concentration of Na+ and K+ inside and outside of the celld. all of the abovee. b and c only
describe what the resting membrane potential of a cell is. What is the resting membrane potential of neurons (give units)? What are the two factors that generate the resting membrane potential? Think of scenarios that change the factors that generate the resting membrane potential and how that would change the overall resting membrane potential.
At rest, a neuron has a lower concentration of sodium than the surrounding fluid. When a neuron sends a signal, it opens sodium channels. What happens to the sodium when the sodium channels open? A. The sodium diffuses out of the cell. B. The sodium is pumped into the cell. C. The sodium is pumped out of the cell. D. The sodium diffuses into the cell.
A cell biologist is performing an experiment using the voltage clamp method in which they are allowed to change the voltage in the membrane potential. They are wanting to record potassium currents and notice that for a certain membrane potential range, the voltage clamp highlights that there is an inward current of potassium. Would these readings make sense?
Neurons a. How does the neuron re-establish its resting membrane potential after an action potential? -Sodium (Na+) gated channels close -Sodium (Na+) gated channels open -Potassium (K+) and sodium (Na+) gated channels close -Sodium/ potassium pumps (Na+/K+ pumps) exchange ions b.Which of the ion channels utilizes a passive transport system (in other words, do not require ATP)? Mark all that apply. -K+ leak channels -K+ channels (gates) -Na+ leak channels -Na+ channels (gates) -Na+/K+ pumps c.The absolute refractory period occurs when the neuron is undergoing the action potential and implies it cannot be further stimulated. True or False d. After an action potential, as the neuron repolarizes, the resting membrane potential is immediately re-established True or False e.Match the type of gate or process with its overall effect on the neuron So Match each term with the best-fit description. Terms: Na+/K+ pump K+ voltage gate Resting membrane potential Hyperpolarization Na+ voltage gate…
How are vesicles with neurotransmitter transported to the synaptic cleft? A. Retrograde, slow transport. B. Anterograde, slow transport. C. Retrograde, fast transport. D. Anterograde, fast transport.