2C Cellular Size + Shape

Question 1

Why are cells so small?

Answer 1

1. It is more efficient to transport
   nutrients and remove wastes
2. They have different purposes

Benefits:
1. Efficient exchange of materials with the extracellular environment
2. Faster intercellular transport

Question 2

Surface Area to Volume Ratio

Answer 2

1. Calculating volume:

• L by W by H

2. Calculating SA:

• The area of any one side calculated
• Multiply this side by the no. of sides

3.
- SA divided by volume
- Convert into SA:V ratio

4. • Greater difference between surface area to volume ratio = smaller objects = Larger SA:V ratio
   • Objects = same volume + larger SA = Higher SA:V + longer lengths rather than compactness