What is the mechanism by which this molecule works? What molecule transports it into the cell? What happens to this molecule immediately after entering? What stops it from exiting again?

Which of the following cell organelles regulates the entry and exit of molecules to and from the cell?

Which type of cellular transport moves molecules across the membrane by expending energy?

A large polar molecule in the extracellular region can enter a cell by:Select one alternative:moving directly through the phospholipid bilayer of the plasma membrane.moving through a pore in the plasma membrane, created by connexin proteins.moving through the plasma membrane via exocytosis.moving through a carrier protein in the plasma membrane.

It is a transport protein that undergoes conformational change (change in shape) when transporting molecules in and out of the cell.

An example  of a molecule that uses facilitated diffusion to enter the cell is oxygen starch glucose carbon dioxide