Cell Size and Surface Area to Volume Ratio

These flashcards cover key concepts related to cell size, surface area-to-volume ratio, and their implications for cellular function and metabolism.

Cell Size

The size of a cell affects its metabolic functions and efficiency.

Surface Area-to-Volume Ratio

A measurement that explains how efficiently substances can enter and exit the cell; high ratio improves this efficiency.

Metabolic Needs

The requirements for nutrients and the removal of waste that are influenced by the size of the cell.

Formulas for Cuboidal Cells

SA = 6S², V = S³, SA:V ratio = SA/V.

Formulas for Spherical Cells

SA = 4πr², V = 4/3πr³, SA:V ratio = SA/V.

Efficiency of Transport

Smaller cells are generally better at transporting materials due to a higher surface area-to-volume ratio.

Thermal Energy Dissipation

As cell size increases, the ability to dissipate heat effectively decreases.

Effect of Radius on SA:V Ratio

As the radius of spherical cells increases, the SA:V ratio decreases.

Highly Folded Membranes

Structures like cristae in mitochondria increase surface area to enhance metabolic reactions.

Cellular Demand for Resources

As cell size increases, the demand for resources also increases but transport efficiency decreases.