SA:V Flashcards

1
Q

What is SA:V?

A

Surface area to volume ratio.

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2
Q

What is Fick’s law?

A

How fast diffusion works is proportionate to the surface area.

Rate of diffusion = SA x Conc. difference/
Thickness of membrane

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3
Q

What factors affect the rate of diffusion?

A
  • Temperature (The particles move around faster when the temperature is high, so they diffuse faster).
  • Metabolic rate (If chemical reactions are faster, products and reactants are used up faster).
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4
Q

How do you work out SA:V?

A

Example-
- A cubes size is 4x4x4
- A cube has 6 sides
- To clculate surface area (4x4x6=96)
- To calculate volume (4x4x4=64)
- SA:V = 3:2 (simplified)

• SA = height x width x no.sides
• V = height x width x length

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5
Q

What does a larger SA:V indicate?

A

Faster diffusion.

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