Adaptations for Rapid Transport (AQA A Level Biology)

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Adaptations for Rapid Transport

  • The rate at which diffusion (including both simple diffusion and facilitated diffusion) occurs across external and internal cell membranes varies
  • Some cells are adapted for rapid transport (diffusion) of molecules across their internal or external membranes
  • The rate of diffusion depends on several factors. These include:
    • Temperature
    • The surface area of the exchange surface
    • The concentration gradient across the exchange surface
    • The thickness of the exchange surface

Simple diffusion

The rate of simple diffusion depends on three main factors:

The rate of simple diffusion depends on three main factors, downloadable AS & A Level Biology revision notes

Facilitated Diffusion

The rate of facilitated diffusion depends on two main factors

The rate of facilitated diffusion depends on two main factors, downloadable AS & A Level Biology revision notes

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Lára

Author: Lára

Expertise: Biology Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.