Cell Size AP Bio

Front

What is the relationship between cell size and surface area to volume ratio (SA:V)?

Back

As cell size increases, the volume increases faster than the surface area, leading to a lower SA:V ratio, which can limit the efficiency of material exchange.

Front

Why is a high surface area to volume ratio important for cells?

Back

A high SA:V ratio allows for more efficient exchange of materials (nutrients, waste) across the cell membrane, which is crucial for cell survival.

Front

What happens to the SA:V ratio as a cell grows larger?

Back

The SA:V ratio decreases as the cell grows larger, making it less efficient in exchanging materials.

Front

What is diffusion in the context of cell biology?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, which is essential for the exchange of substances across the cell membrane.

Front

How does surface area affect the rate of diffusion?

Back

Increased surface area allows more molecules to pass through the membrane at once, thus increasing the rate of diffusion.

Front

What is the formula for calculating surface area to volume ratio (SA:V)?

Back

SA:V = Surface Area / Volume.

Front

If a cube has a side length of 2 cm, what is its SA:V ratio?

Back

Surface Area = 24 cm², Volume = 8 cm³, so SA:V = 24/8 = 3.

Front

What is the significance of cell shape in relation to SA:V ratio?

Back

Cells with shapes that maximize surface area (like elongated or flattened shapes) have higher SA:V ratios, improving their efficiency in material exchange.

Front

What is the effect of a low SA:V ratio on a cell's function?

Back

A low SA:V ratio can hinder the cell's ability to efficiently exchange materials, potentially leading to cell dysfunction or death.

Front

Why do smaller cells tend to be more efficient than larger cells?

Back

Smaller cells have a higher SA:V ratio, allowing for more efficient nutrient uptake and waste removal.