Volume

Question 1

Surface area of a cube?

Answer 1

A=6a^2

Question 2

Surface area of a rectangular prism?

Answer 2

A=2(wl+hl+hw)

Question 3

Volume of rectangular prism?

Answer 3

V= Lwh

Question 4

Volume of cube?

Answer 4

V=a^3

Question 5

outline the activities occurring in the volume of the cell

Answer 5

Cell volume dictates the amount of materials that are needed/ produced in the cytoplasm

Question 6

outline the activities occurring at the surface of the cell

Answer 6

Cell surface area dictates the amount of exchange across the membrane

Question 7

The more surface area, the more

Answer 7

exchange of nutrients and gases into the cell and wastes out of the cell through the cell membrane

Question 8

The more volume, the more

Answer 8

• nutrients and gases that are need in the cell for metabolic reactions
• the more waste is produced and must leave the cell.

Question 9

explain the benefits of using cubes to model the surface area and volume of a cell

Answer 9

Cubes can be manipulated, visualized and easily measured.

Cells are more difficult to manipulate and measure (BC of microscopic size)

Question 10

Describe the relationship between cell size and the SA:V ratio of the cell

Answer 10

If cell size increases, the SA:V ratio decreases.

Question 11

explain the limitations of using cubes to model the surface area and volume of a cell

Answer 11

cells are not cubic in shape.

But, relationship between SA and V is the same in both cubes and cells.

Question 12

Explain why cells are often limited in size by the SA:V ratio

Answer 12

As a cell becomes too large,

the amount of surface area for exchange of materials through the cell is too little for the metabolic demands of the volume.

The cell will not be able to function rpoperly

Question 13

List 3 adaptions of cells that maximize the SA:V ratio

Answer 13

1) Long extensions (as in neurons)
2) Thin, flattened shape (as in red blood cells)
3) Microvilli, as on small intestine epithelial cells