Cell Size AP Bio

Front

What is the SA:V ratio?

Back

The surface area to volume ratio (SA:V ratio) is a measure that describes how much surface area is available for exchange relative to the volume of the cell. A higher SA:V ratio indicates more surface area for exchange processes.

Front

Why is a high SA:V ratio important for cells?

Back

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

Front

How does cell size affect the SA:V ratio?

Back

As a cell increases in size, its volume increases faster than its surface area, leading to a lower SA:V ratio. This can limit the cell's ability to efficiently exchange materials.

Front

Which cell would have a higher SA:V ratio: a small cell or a large cell?

Back

A small cell would have a higher SA:V ratio compared to a large cell, making it more efficient in material exchange.

Front

What is the relationship between diffusion rate and surface area?

Back

The rate of diffusion across a cell membrane increases with greater surface area, as there is more area available for molecules to pass through.

Front

What is the most important factor for maximizing diffusion across a cell membrane?

Back

Surface area is the most important factor for maximizing the rate of diffusion across a cell membrane.

Front

If Cell A has a SA:V ratio of 6:1 and Cell B has a SA:V ratio of 3:1, which cell is more efficient in material exchange?

Back

Cell A is more efficient in material exchange due to its higher SA:V ratio.

Front

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

Back

As a cell grows larger, its SA:V ratio decreases, which can hinder its ability to efficiently exchange materials.

Front

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

Back

Smaller cells tend to be more efficient because they have a higher SA:V ratio, allowing for better material exchange.

Front

What is one way cells can adapt to maintain a high SA:V ratio?

Back

Cells can adapt by changing shape (e.g., becoming elongated or flattened) or by dividing to maintain a higher SA:V ratio.