Cell Size 2.3

Question 1

How does surface area to volume ratio affect the size of the cell?

Answer 1

The larger the size of the cell, the smaller the ratio of SA to volume ratio is.

Question 2

What type of surface area to volume ratio is most favorable for cells?

Answer 2

The larger the SA to volume is, the more efficient the cell can be. This is because at larger volumes, the demand for internal resources increases, but the SA is not as much to be able to synthesize these required materials.

Question 3

What is the SA to volume ratio of a sphere with a radius of 2? V: 4/3(pi)r^3 SA: 4(pi)r^2

Answer 3

SA: 16(pi)
Vol:32/3(pi)
Ratio: 3:2 SA to V

Question 4

What is the SA to volume ratio of a cube with a side length of 3? V: s^3 SA: 6s^2

Answer 4

SA: 54
V: 27
Ratio: 2:1 SA to V

Question 5

What is the SA to volume ratio of a Rectangular solid with dimensions of 2 x 3 x 4? V: lwh SA: 2lh+2lw+2wh

Answer 5

SA: 52
V: 24
Ratio: 13:6 SA to V

Question 6

What is the SA to volume ratio of a Cylinder with a radius of 2 and height of 4? V: h(pi)r^2 SA: 2(pi)rh+2(pi)r^2

Answer 6

SA: 24 (pi)
V: 16(pi)
Ratio: 3:2 SA to V

Question 7

How does an increase of surface area affect the increase in volume?

Answer 7

A larger surface area usually means a smaller volume unless there are folds in the membrane into the cell.

Question 8

How can a cell increase surface area without increasing the volume?

Answer 8

If there are folds in the membrane of the cell. (cristae in mitochondria, hairs on roots, villi and microvilli in intestines)

Question 9

How can an increase in surface area affect heat exchange?

Answer 9

The larger the SA, the easier it is to exchange heat. Elephants have large ears in order to increase SA and facilitate the exchange of heat.

Question 10

Identify and describe two examples of specialized surfaces for exchanging materials with the surrounding environment.

Answer 10

Elephants have large ears in order to increase SA and facilitate the exchange of heat.

Question 11

Identify and describe two examples of strategies that organisms use to obtain nutrients and eliminate wastes.

Answer 11

The stomata can open and close on leaves. They are able to open for CO2 to enter, but when CO2 is no longer needed, they close which prevents H20 and O2 from escaping.