Please help with these two questions, thank you so much!!! **Ion Concentrations and Equilibrium Potential**The table below provides the concentration gradients for various ions inside and outside a cell, along with their equilibrium potentials.| Ion | Inside concentration (mM) | Outside concentration (mM) | Equilibrium Potential ||------------|---------------------------|----------------------------|-----------------------|| Sodium | 15 | 145 | +60 mV || Potassium | 125 | 5 | -85 mV || Chloride | 13 | 150 | -65 mV |**Question 5:** Assuming the concentration gradients from the table above, and a membrane potential of 0mV, if a sodium (Na⁺) selective ion channel opens on the plasma membrane, which direction do we expect Na⁺ ions to flow?- a. Out of the cell- b. Into the cell- c. NeitherCorrect Answer: **b. Into the cell**---**Question 6:** Assuming the concentration gradients from the table above, and a membrane potential of -85mV, if a potassium (K⁺) selective ion channel opens on the plasma membrane, which direction do we expect K⁺ ions to flow?- a. Out of the cell- b. Into the cell- c. NeitherCorrect Answer: **c. Neither**

Answered: lon Sodium Inside concentration (mM)…

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

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

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Please help with these two questions, thank you so much!!!

**Ion Concentrations and Equilibrium Potential**

The table below provides the concentration gradients for various ions inside and outside a cell, along with their equilibrium potentials.

| Ion | Inside concentration (mM) | Outside concentration (mM) | Equilibrium Potential |
|------------|---------------------------|----------------------------|-----------------------|
| Sodium | 15 | 145 | +60 mV |
| Potassium | 125 | 5 | -85 mV |
| Chloride | 13 | 150 | -65 mV |

**Question 5:**
Assuming the concentration gradients from the table above, and a membrane potential of 0mV, if a sodium (Na⁺) selective ion channel opens on the plasma membrane, which direction do we expect Na⁺ ions to flow?

- a. Out of the cell
- b. Into the cell
- c. Neither

Correct Answer: **b. Into the cell**

---

**Question 6:**
Assuming the concentration gradients from the table above, and a membrane potential of -85mV, if a potassium (K⁺) selective ion channel opens on the plasma membrane, which direction do we expect K⁺ ions to flow?

- a. Out of the cell
- b. Into the cell
- c. Neither

Correct Answer: **c. Neither**

Expert Solution

Step 1

The Na+/K+-pump is an active exchanger that has unique roles in the production of action potentials as well as the regulation of other active transport systems. It uses ATP hydrolysis as an energy source to move both ions across the neuronal membrane against their concentration gradients.

Type of stages:

The membrane potential is at rest when a polarised condition exists. When the membrane potential is more negative than the resting potential, this is known as a hyperpolarized state. The membrane potential enter a depolarized condition when it is less negative than the resting potential.

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