MEDICAL PHYSIOLOGY

Detailed explanation-1: -Note: The SA/V ratio still increases as the cell expands, but as the cell starts to split, that ratio begins to shrink, and the SA/V ratio is cut in half by the time the cell is ready to go through cytokinesis, so the cell divides to produce two new cells.

Detailed explanation-2: -The last part of interphase is called the G2 phase. The cell has grown, DNA has been replicated, and now the cell is almost ready to divide. This last stage is all about prepping the cell for mitosis or meiosis. During G2, the cell has to grow some more and produce any molecules it still needs to divide.

Detailed explanation-3: -The Cell Cycle consists of 3 stages: Stage 1-The cell grows, the DNA is made into two copies and more organelles are made. Stage 2-Mitosis in which the nucleus divides inside the cell. Stage 3-The cell splits into two identical daughter cells.

Detailed explanation-4: -As a cell grows, its surface area to volume ratio decreases making diffusion and osmosis less efficient and occur more slowly. When a cell divides, the resulting cells are smaller which increases the surface area to volume ratio.

Detailed explanation-5: -Cell division requires an increase in surface area to volume ratio. During early development, surface area can increase, volume can decrease, or surface topography can be optimized to allow for division. While exocytosis is thought to be essential for division [Mol.