Unit 2 Cell Size

What does cell metabolism depend on?

Cell size

What must cells dissipate for cell metabolism to occur?

Thermal energy

What must leave cells in order for cell metabolism to occur?

Cellular waste

What must enter cells in order for cell metabolism to occur?

Nutrients and other resources/chemical materials

What do cells have difficulty doing at a certain size?

Regulating what comes in and out of the plasma membrane

What does an increase in the size of cells lead to?

More metabolic activity 

What does an increase in the metabolic activity of cells lead to?

More cellular materials needed and wastes produced

What does an increase in the amount of cellular materials needed and wastes produced of cells lead to?

More stress and less efficiency

What does the size of cells dictate?

Their function

What do cells need in order to optimize the exchange of material through the plasma membrane?

A high surface area-to-volume ratio

Volume increases more slowly than surface area.

False

What happens to the volume of a cuboidal or rectangular cell as it’s diameter doubles?

Increases 8-fold

What size do cells tend to be?

Small

What kind of surface area to volume ratio do small cells have?

High SA:V

What kind of surface area to volume ratio do large cells have?

Low SA:V

What do larger cells lose?

Efficiency exchanging materials

What increases in regards to larger cells?

Cellular demand for resources

What decreases in regards to larger cells?

Rate of heat

What becomes inefficient in regards to larger cells?

Rate of diffusion