Carbon dioxide is a waste product made by cells. It passes out of cells and travels in the blood to an organ to be breathed out. Which organ gets rid of (excretes) carbon dioxide?
The rate of diffusion of a substance into or out of a cell depends on the difference in concentration (also called the concentration gradient) between the inside and the outside of the cell.
The table shows the oxygen concentration inside and outside five cells.
In which cell (A, B, C, D, or E) would the diffusion of oxygen into the cell be fastest?
|Cell||Concentration of Oxygen Outside ()||Concentration of Oxygen Inside ()|
Complete the sentence: Diffusion is the movement of from an area of high concentration to an area of low concentration.