chemical synapse
it occurs when water moves across a membrane to a lower concentration from a higher concentration.
Carbon dioxide moves out of the cells from a higher to lower concentration across the cell membrane. Then the CO2 moves through the capillary wall across the diffusion gradient. The diffusion process is repeated at the capillary/alveolar junction.
Water moves between cells by osmosis, down a concentration gradient.
chyme
Endocytosis moves into cell Exocytosis moves out of cells ...
away from the area where it is more concentrated
the earth moves
capilaries
A symporter moves two different molecules in the same direction across a cell membrane, while an antiporter moves two different molecules in opposite directions.
Blood moves materials past cells, allowing for diffusion. It also moves cells themselves to places they are needed, as with immune system cells.
The velocity of the book will remain constant as it moves across a surface with no friction.
The Cytoplasm moves things in a cell