Help me with my homework. I only know cell membrane but I dont know the other factors.
2006-10-26 19:05:36 · 0 answers · asked by Anonymous in Science & Mathematics ➔ Biology
the ration of volume to cell surface is the biggest factor. if it gets too big, it will take too long to transport necessary molecules form the cytoplasmic mebrane or nucleus out to the environmment or vica versa. size is usually regulated by genes encoded in the DNA.
2006-10-26 19:23:17 · answer #1 · answered by Joey H 2 · 3⤊ 1⤋
Factors That Limit Cell Size
2016-11-16 14:07:45 · answer #2 · answered by buitron 4 · 0⤊ 0⤋
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What and describe the factors that limit the cell size?
Help me with my homework. I only know cell membrane but I dont know the other factors.
2015-09-10 00:49:59 · answer #3 · answered by Josee 1 · 0⤊ 0⤋
Surface area-to-volume ratio imposes limits on cell size
• as cell’s size increases, its volume increases more rapidly than surface area
– surface area of sphere = 4pr2
– volume of sphere = 4/3pr3
• for example
– cell radius: 1cm 10cm
– surface area:12.57cm2 1257 cm2
– volume: 4.189 cm3 4189 cm3
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The advantages does small size give to a cell is ….
Many cellular processes occur by diffusion, which is efficient over short distances, but less efficient over long distances. Since all materials going in and out of a cell must pass through the plasma membrane, the greater the surface area of this membrane, the faster a given quantity of molecules can pass through. Smaller cells have a much greater surface-to-volume ratio than larger cells and therefore can "feed" all areas of the cell in less time.
The "surface-to-volume ratio” & its affect on cell size:
The surface-to-volume ratio is a mathematical relationship between the volume of an object and the amount of surface area it has. This ratio often plays an important role in biological structures. Think of a cell as a sphere:
The surface area of a sphere can be calculated by
4ð r2
where r is the radius of the sphere.
Volume of a sphere can be calculated by
4/3 ð r3.
An increase in r will increase the surface area by a power of two, but increase the volume by a power of three. This means that the volume will increase much faster than the surface area. This puts an upper limit on the size of a cell, because if the cell volume gets too big, there won't be enough membrane to transport the amount of food in and wastes out to support that large cell size.
2006-10-26 20:59:41 · answer #4 · answered by Anonymous · 8⤊ 0⤋
Because photosynthesis is less
2016-03-13 08:22:42 · answer #5 · answered by Claudio 1 · 0⤊ 0⤋
bio sux
2014-11-12 10:57:56 · answer #6 · answered by Anonymous · 0⤊ 0⤋