AP BIOLOGY

Detailed explanation-1: -Is it by osmosis, by diffusion or any other process? Answer 1: Carbon dioxide and oxygen move by diffusion due to a pressure gradient. Since the pressure of oxygen in the blood due to the blood cells is so high, oxygen always moves out of the blood into the surrounding cells.

Detailed explanation-2: -To see an easy demonstration of osmosis, soak gummy candies in water. The gel of the candies acts as a semipermeable membrane. Examples of Diffusion: Examples of diffusion include perfume filling a whole room and the movement of small molecules across a cell membrane.

Detailed explanation-3: -This is False-oxygen travels through the membrane via a process called diffusion. Osmosis is only a means of transport for water molecules across the cell membrane. Oxygen can diffuse directly through the membrane because it is a small, hydrophobic molecule.

Detailed explanation-4: -Answer and Explanation: An example of diffusion is c. passage of oxygen from the alveoli to the blood. Diffusion is the process by which a molecule moves from an area of high concentration to an area of low concentration, and it usually occurs across some sort of membrane.