What is the job of the GLUT-4 transporters?

What is the job of the GLUT-4 transporters?

• A. Move water across membranes
• B. Allows glucose to pass from blood plasma into cell cytoplasm
• C. Break down glucose
• D. Signal immune response

Answer: (B)

GLUT-4 are glucose transporter proteins that enable glucose to move from the blood into cells by facilitated diffusion, mainly in muscle and fat tissue. When insulin signals, GLUT-4-containing vesicles move to and fuse with the cell membrane, increasing glucose uptake into the cytoplasm. This process uses no direct energy and helps lower blood glucose after meals. They are not water channels, they don’t break down glucose, and they don’t trigger immune signaling.

GLUT-4 are glucose transporter proteins that enable glucose to move from the blood into cells by facilitated diffusion, mainly in muscle and fat tissue. When insulin signals, GLUT-4-containing vesicles move to and fuse with the cell membrane, increasing glucose uptake into the cytoplasm. This process uses no direct energy and helps lower blood glucose after meals. They are not water channels, they don’t break down glucose, and they don’t trigger immune signaling.