How does GLUT1 utilize glucose concentration gradients for glucose uptake in erythrocytes?

GLUT1 does not rely on concentration gradients for glucose transport.

GLUT1 transports glucose from areas of low concentration in the blood to high concentration inside the cell.

GLUT1 transports glucose against its concentration gradient using ATP.

GLUT1 transports glucose from areas of high concentration in the blood to low concentration inside the cell.