AP BIOLOGY

Detailed explanation-1: -Oxygen molecules are small, and all cells need it for respiration to release energy from food molecules. Because there’s a higher concentration of oxygen molecules outside the cell compared to the cell’s cytoplasm, you’ll see that oxygen diffuses into the cell along this concentration gradient.

Detailed explanation-2: -If a cell is placed in a hypertonic solution, there will be a net flow of water out of the cell, and the cell will lose volume. A solution will be hypertonic to a cell if its solute concentration is higher than that inside the cell, and the solutes cannot cross the membrane.

Detailed explanation-3: -Inside the cell, the concentration of oxygen molecules is higher due to the presence of more oxygen-containing molecules. 2. This increase in concentration is due to the diffusion of oxygen molecules across cell membranes.

Detailed explanation-4: -This is because cells rapidly use up oxygen during metabolism and so, there is typically a lower concentration of O2 inside the cell than outside. As a result, oxygen will diffuse from outside the cell directly through the lipid bilayer of the membrane and into the cytoplasm within the cell.

Detailed explanation-5: -A hypertonic solution is a particular type of solution that has a greater concentration of solutes on the outside of a cell when compared with the inside of a cell. Water crosses the cell membrane in both directions, but more water leaves the cell than enters it.