Chapter 3: Problem 4

What part of the cell membrane is necessary for facilitated diffusion? Describe one way this process is important within the body. (p. 55)

Short Answer

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Answer: The integral membrane proteins, particularly channel proteins and carrier proteins, play a crucial role in facilitated diffusion by helping transport substances across the membrane. This process is important within the body as it helps maintain glucose homeostasis, ensuring adequate glucose levels for proper functioning and survival of cells.

Step by step solution

Identify the part of the cell membrane responsible for facilitated diffusion

The part of the cell membrane necessary for facilitated diffusion is the integral membrane proteins, particularly channel proteins and carrier proteins. These proteins help in transporting substances across the membrane that otherwise cannot easily pass through the lipid bilayer.

Describe the process of facilitated diffusion

Facilitated diffusion is a type of passive transport where substances move across the cell membrane down their concentration gradient, with the help of channel proteins or carrier proteins. This process does not require energy as the substances are moving from a region of higher concentration to a region of lower concentration.

Explain the importance of facilitated diffusion within the body

One importance of facilitated diffusion within the body is maintaining glucose homeostasis. In this process, GLUT (Glucose Transporter) carrier proteins help in transporting glucose across the plasma membrane of cells. This is crucial because glucose serves as the primary source of energy for cells, and maintaining adequate glucose levels is essential for proper functioning and survival of the cells in the body.

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What part of the cell membrane is necessary for facilitated diffusion? Describe one way this process is important within the body. (p. 55)

Short Answer

Step by step solution

Identify the part of the cell membrane responsible for facilitated diffusion

Describe the process of facilitated diffusion

Explain the importance of facilitated diffusion within the body

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