Cell Size and Diffusion

Calculate the SA for a cube-shaped cell with sides equal to .8mm. SA of a cube = length x width x 6 (# of sides)

• 3.84 mm²

• .5 mm³

• .5 mm²

• 3.84 mm³

Which cells are more efficient at obtaining nutrients?

• Small Cells
• Medium Size Cells
• Large Cells
• X-Large Cells

How is the relationship between the cell size and the cell nutrient absorption rate determined? (How do you determine the surface area to volume ratio)

W=width, L=length, H=height, SA= surface area, and V=volume

• (6xWxL)

• (WxLxH)

• SA ➗V

• V➗SA

Calculate the SA:V ratio for a cube-shaped cell with sides equal to .1 mm. You must first calculate the volume (length x width x height) and the surface area (length x width x # of sides)

• 6:1

• 60:1

• 600:1

• .6:1

Calculate the volume for a cube-shaped cell with sides equal to .4mm. Volume of a cube = length x width x height.

• .06 mm²

• .06 mm³

• .96 mm³

• .96 mm²

Which of the following is NOT a reason why cells need to remain small?

• to efficiently obtain nutrients
• to efficiently obtain waste products
• to efficiently remove waste produces
• to efficiently send signals to the center of the cell

How does the SA:V ratio change as the size of the cell increases?

• It increases
• it decreases
• it remains the same
• it is not affected by cell size

How does the SA:V ratio change as the size of the cell decreases?

• it increases
• it decreases
• it remains the same
• it is not affected by cell size

Which cube-shaped cell would be the most efficient?
A: .01 mm
B: 1.4 mm

• A
• B
• They are equally efficient

Which cube-shaped cell would have a higher SA:V ratio?
A: .01 mm
B: 1.4 mm

• A
• B
• They are equally efficient