**Question Q5.6:** If calcium ions, each of which has a charge of +2 (\( \text{Ca}^{2+} \)), moved INTO a neuron, and no other ions were moving, what would be TRUE?- The area outside the neuron would become more positively charged.- The concentration of \( \text{Ca}^{2+} \) inside the cell would decrease.- The neuron would become more negative.- The neuron would become more positive.[Submit Button]

Movement of ions into the cells across the plasma membrane depends on the presence of specific…

Q5.6. If calcium ions, each of which has a charge of +2 (Ca²+), moved INTO a neuron, and no other ions were moving, what would be TRUE? The area outside the neuron would be become more positively charged. The concentration of Ca2+ inside the cell would decrease. The neuron would become more negative. The neuron would become more positive. Submit

Q5.6. If calcium ions, each of which has a charge of +2 (Ca²+), moved INTO a neuron, and no other ions were moving, what would be TRUE? The area outside the neuron would be become more positively charged. The concentration of Ca2+ inside the cell would decrease. The neuron would become more negative. The neuron would become more positive. Submit

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Q4.6. If calcium ions, each of which has a charge of +2 (Ca2*), moved OUT OF a neuron, and no other ions were moving, what would be TRUE? The area outside the neuron would be become more negatively charged. The concentration of Ca2* inside the cell would increase. The neuron would become more negative. The neuron would become more positive.
9. You are performing an experiment at with an artificial membrane (i.e not a living cell). You place a NaCl solution on each side of the membrane. You discover that if you place a 10-fold NaCl concentration gradient across this membrane (higher NaCl concentration outside than inside) you initially see a +20 mV membrane potential develop. If the Cl permeability is assigned a value of 1, what value would you assign to the Na" permeability? Assume 2.3RT/F = 60 mV.
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
During an Action Potential. 52. Sección Na* flows out of the cell 53. Na' activation gates and inactivation gates are both open 54. Na* flows into the cel 55. Calcium flows out of the cell 56. K* gates are open 57. Na* activation gates are closed 58. Na* inactivation gates are closed 59. K* flows into the cell K* gates are closed Na* activation gates and inactivation 60. 61. gates are both closed 62. K* flows out of the cell Salto de columna A. Depolarization B. Repolarization C. BOTH depolarization and repolarization D. Neither depolarization or repolarization
7. Draw a standard action potential compared to an action potential whose voltage gated potassium channels have been inactivated with tetraethylammonium (TEA). a. Draw the curves. Label all axes. b. Describe how and why they are different.
Q5.3. After the rising phase, which ion channel is responsible for action potential returning to its resting Vm, and why? Na+ channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise V m Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise Im K* channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm K+ channels, because positive K* ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vm Submit