Injested carbohydrates are broken down through saliva and the stomach into smaller fragments called mono saccharides, or simple sugars. These sugars are transported to the absorptive cells in the lining of the stomach, where they are in, exit, then passively diffuse into the adjoining capillaries.
Nutrients exit and waste enters red blood cells in the capillaries within tissues. These exchanges occur through the thin walls of the capillaries by diffusion.
The capillary bed in the lungs is where the oxygen and carbon dioxide are exchanged.
Sugar molecules enter a cell through a process called facilitated diffusion, which involves specific carrier proteins in the cell membrane that help transport the sugar molecules across. Sugar molecules can also exit a cell through a similar process involving these carrier proteins.
From stage of the cell cycle do cells somtimes exit?
cell membrane
It controls the entry and exit of substances.
osmosis
To get to the other side
A sperm.
"The cell membrane has openings in it." (PLATO) (:
selective permeability
Selective permeable