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Chapter 5: Q. 30 (page 154)

How does the sodium-potassium pump contribute to the net negative charge for the interior of the cell?

Short Answer

Expert verified

The sodium-potassium pump contributes to the net negative charge inside the cell by the electrochemical gradient.

Step by step solution

01

Step 1. Introduction

During the active transport process, cells use energy in the form of ATP. The cell is electrically negative from inside than the extracellular fluid. The concentration of potassium is higher inside the cell and the concentration of sodium is lower than that of the extracellular fluid.

02

Step 2. Explanation

The concentration gradient of sodium in the cell tends to move into the cell and the electrical gradient of Na+ moves it inside to the negative charge but this situation is different for other elements like potassium in this situation electrical gradients of the K+ move into the cell but the concentration gradients move K+ outside the cells.

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Most popular questions from this chapter

Which transport mechanism can bring whole cells into a cell?

  1. Pinocytosis
  2. Phagocytosis
  3. Facilitated transport
  4. Primary active transport

What is the primary function of carbohydrates attached to the exterior of cell membranes?

  1. identification of the cell
  2. flexibility of the membrane
  3. strengthening the membrane
  4. channels through membrane

The sodium/calcium exchanger (NCX) transports sodium into and calcium out of cardiac muscle cells. Describe why this transporter is classified as secondary active transport.

Describe two ways that decreasing temperature would affect the rate of diffusion of molecules across a cell’s plasma membrane.

Which characteristic of a phospholipid contributes to the fluidity of the membrane?

  1. its head
  2. cholesterol
  3. a saturated fatty acid tail
  4. double bonds in the fatty acid tail
See all solutions

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