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Give example of facilitated diffusion?
An example of facilitated diffusion is the movement of glucose into a cell with the help of glucose transport proteins embedded in the cell membrane. These transport proteins provide a channel for glucose molecules to pass through the membrane, following the concentration gradient from higher to lower concentration without requiring energy input.
What structure is the statement below most likely referring to A large glucose molecule requires facilitated diffusion but an oxygen molecule does not?
A large glucose molecule requires facilitated diffusion but an oxygen molecule does not is a semipermeable membrane.
Glucose and no other sugar is transported into cells by protein carrier molecules in the cell surface membrane. How do carrier molecules specifically recognize glucose?
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.
What change takes place in the cell membrane if a signal molecule causes a transport protein to open?
When a signal molecule activates a transport protein on the cell membrane, it undergoes a conformational change that opens a channel or alters its affinity for the molecule it transports. This allows specific substances to move across the membrane, facilitating cellular communication and maintaining homeostasis.
What part of the cell is like a gate?
In this analogy, the cell membrane is like a wall, keeping what's in the cell inside, and what is outside of the cell out. However, there are "gates" called receptors. Receptors are large protein molecules embedded in the membrane, with one end outside and one end inside. Different gates, or receptors, permit certain things to enter. For example a glucose receptor lets glucose enter the cell. When a glucose molecule passes a glucose receptor, the glucose molecule is attracted to the receptor by an electric charge. It then binds to the receptor, but now the balance of the charges in the protein molecule has been changed, so the protein molecule changes shape. When it changes shape, it pulls the glucose into the cell and then lets go of the glucose. Now the protein is free to return to its original shape, and the glucose is inside the cell.
What happens if a molecule is too large to go through a membrane?
The molecule will be transported across the membrane by way of a transport protein or protein channel.
What is a example of a molecule that uses a channel protein?
An example of a molecule that uses a channel protein is glucose. Glucose transporters, specifically GLUT proteins, facilitate the passive transport of glucose across the cell membrane through channel proteins, allowing cells to absorb glucose efficiently without the need for energy. This process is crucial for maintaining energy levels in cells, particularly in insulin-sensitive tissues like muscle and fat.
What is a molecule used by glucose as a piggyback into and out of the cell in the process of active transport?
The glucose transporter is a membrane bound protein that binds to glucose and mediates it's transport into or out of the cell.
What is it called when a molecule moves a membrane through a protein channel without using energy?
passive transport
What is is when a molecule moves across a membrane through a protein channel without using energy?
Passive Transport
Give example of facilitated diffusion?
An example of facilitated diffusion is the movement of glucose into a cell with the help of glucose transport proteins embedded in the cell membrane. These transport proteins provide a channel for glucose molecules to pass through the membrane, following the concentration gradient from higher to lower concentration without requiring energy input.
What is it called when a molecule moves arcross a membrane through a protein channel without using energy?
passive transport
What is it called when a molecule moved across a membrane through a protein channel without using energy?
Passive Transport
What is it called when molecule moves across a membrane through a protein channel without using energy?
Passive Transport
What is it called a molecule moves across a membrane through a protein channel without using energy?
Passive Transport
What is it called when a molecule moves across a membrane through a protein channel without using energy '?
Passive Transport
What structure is the statement below most likely referring to A large glucose molecule requires facilitated diffusion but an oxygen molecule does not?
A large glucose molecule requires facilitated diffusion but an oxygen molecule does not is a semipermeable membrane.
