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What is a protein moves molecules across a membrane?
Facilitated diffusion moves molecules through cell membranes passively.
What does active transport and facilitated diffusion have in common?
Both active transport and facilitated diffusion are methods of moving substances across cell membranes. Active transport requires energy input to move substances against their concentration gradient, while facilitated diffusion does not require energy and moves substances along their concentration gradient with the help of transport proteins.
How are diffusion and facilitated diffusion similar?
Substances enter a cell through the cell membrane
What is something called that moves a substance into and out of a cell in facilitated diffusion called?
A membrane protein known as a transporter or carrier protein moves substances into and out of cells in facilitated diffusion. These proteins are specifically designed to bind to certain molecules and transport them across the cell membrane.
How is active transport similar to facilitated diffusion in terms of their mechanisms of moving substances across the cell membrane?
Active transport and facilitated diffusion are both mechanisms used by cells to move substances across the cell membrane. Both processes require the use of specific proteins embedded in the cell membrane to facilitate the movement of substances. However, the key difference between the two is that active transport requires energy input from the cell to move substances against their concentration gradient, while facilitated diffusion does not require energy and moves substances down their concentration gradient.
What does a cell use during facilitated diffusion to help get substances in or out of the cell?
carrier protein
What is the primary cause of diffusion?
The primary driving force of facilitated diffusion are surface cell proteins. These proteins transport substances in and out of the cell.
Cell must expend energy to transport substances using?
Facilitated diffusion.
What cell must expend energy to transport substances using?
Facilitated diffusion
Substances that move across a cell membrane without using energy?
Passive transport is the movement of substances across a cell membrane without the use of energy. This process includes simple diffusion, facilitated diffusion, and osmosis. These mechanisms rely on the concentration gradient to drive the movement of molecules.
What are 2 ways that substances across the cell membrane without using energy?
simple diffusion, facilitated diffusion, and osmosis (water)
Controls what moves into cells?
Cell membranes control what moves into cells by selectively allowing certain substances to pass through while blocking others. This selectivity is maintained through various processes such as diffusion, facilitated diffusion, and active transport. Additionally, cell membranes contain specific transport proteins and channels that help regulate the movement of molecules in and out of the cell.
