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Facilitated diffusion does not require energy because it relies on the use of carrier proteins to transport molecules across a cell membrane down their concentration gradient. These carrier proteins facilitate the movement of specific molecules such as glucose or ions without the need for ATP or energy input.
carrier proteins transport glucose into a muscle cell
Carrier molecules are not involved.Different between chemical potential leads the diffusion
Hemoglobin molecules function as the carrier in the human blood circulation system.
Carrier molecules have specific binding sites that are complementary to the structure of glucose molecules. This allows the carrier molecules to selectively recognize and transport glucose across the cell membrane while excluding other sugars. The specificity of recognition is determined by the shape, size, and chemical properties of both the carrier molecule and the glucose molecule.
carrier molecules
Carrier molecules in the plasma membrane are actually used for both active and passive transport of molecules. In active transport, carrier proteins use energy to move molecules against their concentration gradient, while in passive transport, carrier proteins facilitate the movement of molecules down their concentration gradient without the need for energy input.
Active transport is the process that involves the use of specific carrier molecules to move substances across a cell membrane against their concentration gradient. These carrier molecules enable the movement of molecules or ions into or out of the cell by binding to the specific substance and undergoing a conformational change.
A carrier protein is a type of protein that helps transport specific molecules across cell membranes. These proteins bind to molecules on one side of the membrane and release them on the other side, facilitating their movement into or out of cells. Carrier proteins play a crucial role in maintaining cellular function by regulating the transport of essential molecules.
Carrier proteins in active transport actively pump molecules or ions against their concentration gradient across a cell membrane using energy from ATP. They allow specific substances to be moved across the membrane in a controlled manner, helping to maintain cellular homeostasis and regulate cell function.
The electron carrier molecules of the Krebs cycle are NADH and FADH2. In the Calvin cycle, the electron carrier molecule is NADPH.
A carrier protein helps transport molecules across a cell membrane by binding to specific molecules and changing shape to move them across the membrane.