Imagine that a neuron has 5X higher sodium outside than inside and 10X higher potassium inside than outsid Which direction do you predict the ions to move just based off of concentration gradient? both ions will move into the cell both ions will move out of the cell sodium will move in and potassium will move out sodium will move out and potassium will move in

Imagine that a neuron has 5X higher sodium outside than inside and 10X higher potassium inside than outsid Which direction do you predict the ions to move just based off of concentration gradient? both ions will move into the cell both ions will move out of the cell sodium will move in and potassium will move out sodium will move out and potassium will move in

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 2TYK

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Watch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of converting electrical signals to chemical signals and back requires subtle changes that can result in transient increases or decreases in membrane voltage. To cause a lasting change in the target cell, multiple signals are usually added together, or summated. Does spatial summation have to happen all at once, or can the separate signals arrive on the postsynaptic neuron at slightly different times? Explain your answer.
Watch this video (http://openstaxcollege.org/l/neurotrans) to learn about the release of a neurotransmitter. The action potential reaches the end of the axon, called the axon terminal, and a chemical signal is released to tell the target cell to do something, either initiate a new action potential, or to suppress that activity. In a very short space, the electrical signal of the action potential is changed into the chemical signal of a neurotransmitter, and then back to electrical changes in the target cell membrane. What is the importance of voltage-gated calcium channels in the release of neurotransmitters?
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)
The above depolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport K+ ions out of the cytoplasm E. a sodium current will transport Na+ ions into the cytoplasm
Two scientists calculated the membrane potential of a neuron using two different equations, the Nernst equation and the Goldman equation. Their calculations gave them slightly different predictions. What is the most likely reason for this difference? The lipid compositions of the cell membranes that the scientists studied were different. The scientists placed their measuring electrodes in slightly different positions. The temperatures of the fluid surrounding the cell membranes were different. The numbers of ions considered in the calculations were different. The scientists measured different numbers of cells.
Which of the following best describes the electrical state of a neuron at rest? a. The inside of a neuron is more negatively charged than the outside. b. The outside of a neuron is more negatively charged than the inside. c. The inside and the outside of a neuron have the same electrical charge. d. Potassium ions leak into a neuron at rest.
How do Na + enter a neurone when initiating an action potential? A) voltage- gated Na+ facilitated transporterB) a gated Na+ pumpC) the legend geted Na +channelD) a voltage- gated Na+ channel K) The Na+ /K+ATPage
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.
If the neuron is stimulated such that its membrane potential changes to 50 mV, what is the sign of the driving force for Cl- ions and in which direction will these ions move across the membrane? Positive driving force; Cl- moves into the cell Positive driving force; Cl- moves out of the cell Negative driving force; Cl- moves into the cell Negative driving force; Cl- moves out of the cell
This graph shows the relative voltage of a neuron's cytoplasm near the plasma membrane relative to the zone outside the membrane. A similar graph could be drawn for a skeletal muscle cell. Which statement about this graph is NOT RIGHT? A. During "A" there are more K+ inside the cell than outside the cell B. Between D and E the sodium potassium pump is getting ions to their original positions C. During "C" Chloride ions (Cl-) are rushing inside the cell D. During "B" Na+ are rushing inside the cell
In the membrane of a neuron, what happens during an IPSP? A. All the ion gates in the membrane close. B. The sodium gates open. C. The potassium or chloride gates open. D. All the ion gates in the membrane open.
1.A poison causes a drastic rise inE value with stimulation of the membrane.Thereafter membrane is slow to return towards resting membrane potential and levels off several millivolts above the threshold potential. This poison has likely affect which feature of the membrane? a) voltage gated na+ channels. b) voltage gated K+ channels. c) Na+/K+ Atp pump 2. All cell membrane demonstrate action potential if stimulated enough? True/False. 3. how many peaks are there in a compound action potential? a)2. b)4 c)6 d)8 4. Increasing the ionic concentration in the salt bridge results in E value increase to a point after which it plateeus. This is evidence brownian movement at work in the ionic solution that is keeping from energy flowing through the bridge with the fidelity that is seen in the metal bridge? True/ False 5. All cell membrane demonstrate action potential if stimulated enough? True or False.