This is important if you are a cell that depends on diffusion through your cell wall to obtain oxygen, water, and food and get rid of carbon dioxide and waste materials. Show As you get bigger, your outside is unable to keep up with needs of the inside. We can see this with agar cubes that have been soaked in NaOH solution. The "nutrients" have diffused all the way to the centre of the smallest cube, but the largest cube is mostly "starved" in the centre. If you are a cell like the largest cube, your SA:V has become so small that your surface area is not large enough to supply nutrients to your insides. At this point, you must divide into smaller cells or die. So your size is limited by your SA:V. What single factor limits the size that most cells are able to attain?Answer Verified Hint: The cell varies in shape and size, it ranges from as small as 3-30 micrometre to a large size of about 150 millimetres, similar to the size of an ostrich egg. The cell remains smaller in size to maintain the ratio between the fluid and plasma membrane present in them. Complete answer: Additional Information: Note:
Question:What limits the size of a cell? A) lack of building materials B) the size of the organism C) the relationship between the volume of the cell and its surface area D) the job it does E) the materials it has to exchange Cells are microscopic structures that make up the basic units of life. Some cells are organisms on their own, but even the largest organisms are composed of relatively small cells. This is due to a mechanism that regulates the maximum size of a cell. Answer and Explanation: 1The correct answer is (C) the relationship between the volume of the cell and its surface area. The surface-area-to-volume ratio of a cell is the fraction of it's surface area (plasma membrane area) to volume (cytoplasm). A cell must have enough surface area to bring in nutrients and export wastes from its entire volume. However, the ratio of surface area to volume decreases as a cell becomes larger. This places a limit on the largest size that a cell can be. Learn more about this topic:Surface Area to Volume Ratio from Chapter 11 / Lesson 11 Know the definition of surface area and volume. Also, learn how to calculate the surface area to volume ratio and discover the formula used in the calculation. Related to this QuestionExplore our homework questions and answers libraryDifferent types of cells reach different sizes. In general the reasons for cell size limits are due to the mechanisms needed for cell survival and how cells' requirements are met by the structures that form and are contained within cells. (Click on the diagrams on the right for details about the structures of different types of cells.) The factors limiting the size of cells include:
The above limitations affect different types of cells to different extents. Notes about each of the main limitations of cell size follow. 1. Surface area to volume ratio When the size of a cell (having a simple *shape) increases:
2. Nucleo-cytoplasmic ratio
3. Fragility of the cell membrane All cells have and need a cell membrane (sometimes labelled a "plasma membrane") even if the cell also has a cell wall. The structure of cell membranes consist of phospholipids, cholesterol and various proteins. It must be flexible in order to enable important functions of cell membranes such as exocytosis (movement of the content of secretory vesicles out of the cell), endocytosis (movement of the content of secretory vesicles into of the cell) etc.. However the structure of the plasma membrane that enables it to perform its many functions also results in its fragility to environmental variation e.g. in temperature and water potential.
4. Structures that hold the cell together
See also cell functions (in general), the
functions of the cell membrane What factors limit the maximum size of cell?The single factor that limits the size of most of the cell is the surface volume ratio. The size of the cell gets limited by the nucleo-cytoplasmic ratio, which determines the range of control of metabolic ratio and the ratio of surface to volume.
What limits the maximum size of a cell quizlet?The key factor that limits the size of a cell is the ratio of its surface area to its volume.
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