Complete the following questions. Facilitated diffusion...

Name: Problem 13, Chapter 3: Human Biology
Uploaded: 2022-03-25T18:35:08-08:00
Duration: 1 min 33 s
Channel: Khalida Dawar
Description: Complete the following questions. Facilitated diffusion differs from diffusion in that facilitated diffusion a. involves the passive use of a carrier protein. b. involves the active use of a carrier protein. c. moves a molecule from a low to a high concentration. d. involves the use of ATP molecules.

Complete the following questions. Facilitated diffusion differs from diffusion in that facilitated diffusion a. involves the passive use of a carrier protein. b. involves the active use of a carrier protein. c. moves a molecule from a low to a high concentration. d. involves the use of ATP molecules.

Complete the following questions.
Facilitated diffusion differs from diffusion in that facilitated
diffusion
a. involves the passive use of a carrier protein.
b. involves the active use of a carrier protein.
c. moves a molecule from a low to a high concentration.
d. involves the use of ATP molecules.

Key Concepts

Carrier Proteins

Carrier proteins are specialized proteins in the cell membrane that bind to specific molecules on one side of the membrane and change shape to release them on the other side. In the context of facilitated diffusion, these proteins help transport substances across membranes without using cellular energy.

Concentration Gradient

A concentration gradient is the difference in the concentration of a substance between two regions. In passive transport processes like facilitated diffusion, molecules tend to move from an area of higher concentration to an area of lower concentration, which is the driving force behind the movement without the need for additional energy.

Facilitated Diffusion

Facilitated diffusion is a type of passive transport that uses specific transmembrane proteins to help move substances across a cell membrane. Unlike simple diffusion, which occurs directly through the lipid bilayer, facilitated diffusion requires a protein to assist in the transfer, particularly for molecules that cannot easily pass through the membrane due to size or polarity.

Passive Transport

Passive transport refers to the movement of molecules across a cell membrane without the cell expending energy. This process relies on the natural motion of molecules moving down their concentration gradients, utilizing mechanisms like simple diffusion and facilitated diffusion.

Transcript

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