PATHOLOGY MCQ
CELL DAMAGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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to efficiently obtain nutrients
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to efficiently obtain waste products
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to efficiently remove waste produces
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to efficiently send signals to the center of the cell
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Detailed explanation-1: -Cells are so little, so they can maximize their ratio of surface area to volume. Smaller cells have a higher ratio which allows more molecules and ions to move across the cell membrane per unit of cytoplasmic volume. Cells are so small because they need to be able to get the nutrients in and the waste out quickly.
Detailed explanation-2: -So when the cell reaches a size too large, it will divide into smaller cells in order to maintain a surface area/volume ratio that is more favorable to the functioning of the cell. Therefore, cells remain small in order to survive.
Detailed explanation-3: -If the cell grows too large, the plasma membrane will not have sufficient surface area to support the rate of diffusion required for the increased volume. In other words, as a cell grows, it becomes less efficient.
Detailed explanation-4: -Many small cells have more surface area than one large cell. With smaller cells, more surface area is available for oxygen and nutrients to diffuse in and carbon dioxide to diffuse out of the cell. Thus many small cells can take up oxygen and nutrients and release carbon dioxide much more quickly than one large cell.