AP BIOLOGY

Detailed explanation-1: -After food is digested, glucose is released into the bloodstream. In response, the pancreas secretes insulin, which directs the muscle and fat cells to take in glucose. Cells obtain energy from glucose or convert it to fat for long-term storage.

Detailed explanation-2: -Function. GLUT4 exists in skeletal muscle cells, adipocytes, and cardiomyocytes. It is principally responsible for insulin-stimulated glucose uptake into muscle and adipose cells. Approximately 80% of glucose gets transported into muscle cells.

Detailed explanation-3: -The correct choice is: B) Insulin facilitates the movement of intracellular glucose transporters to the cell membrane.

Detailed explanation-4: -1. Insulin facilitates entry of glucose into muscle, adipose and several other tissues. The only mechanism by which cells can take up glucose is by facilitated diffusion through a family of hexose transporters.