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Chapter 5: Q. 29 (page 154)

Where does the cell get energy for active transport processes?

Short Answer

Expert verified

The cell uses energy stored in it in the form of ATP (adenosine triphosphate).

Step by step solution

01

Step 1. Introduction 

Active transport is a process in which molecules or ions move from lower concentration to higher concentration against the concentration gradient.

02

Step 2. Explanation

The cell uses energy in the form of ATP to move the substances against its concentration gradient. Like if the substance concentration is higher inside the cell than outside (extracellular fluid) this movement of substances requires energy which is stored in the cell in the form of ATP.

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Most popular questions from this chapter

How does the sodium-potassium pump make the interior of the cell negatively charged?

  1. By expelling anions
  2. By pulling in anions
  3. By expelling more cations than are taken in
  4. By taking in and expelling an equal number of cations.

What is the combination of an electrical gradient and a concentration gradient called?

  1. Potential gradient
  2. Electrical potential
  3. Concentration potential
  4. Electrochemical gradient

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

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

The principal force driving movement in diffusion is the ________.

  1. Temperature
  2. Particle size
  3. Concentration gradient
  4. Membrane surface area
See all solutions

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