1
Q
what is diffusion
A
the overall movement of particles from an area of high concentration to an area of low concentration (stops at equilibrium) - down a concentration
2
Q
what are the factors affecting diffusion
A
temperature and concentration
surface area and thickness of the membrane
3
Q
what is diffusion in the absence of a membrane
A
simple diffusion
4
Q
which molecules can’t freely travel through the phospholipid bilayer
A
charged particles
polar molecules can travel through slowly
5
Q
what is diffusion through channel proteins called
A
facilitated diffusion
6
Q
what is selective permeability
A
when the membrane is permeable to specific molecules (through carrier or channel proteins)
Biology A Level Module 2 (OCR)
flashcards
Decks in class (15)
# Cards
-
Chapter 2 - Basic components of living systems - microscopy21
-
Chapter 5 - Plasma membranes0
-
Chapter 6 - Cell division0
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Chapter 2 - Basic components of living systems - cell types40
-
Chapter 3 - Biological molecules - overview and water11
-
Chapter 3 - Biological molecules - carbohydrates26
-
Chapter 3 - Biological molecules - lipids14
-
Chapter 3 - Biological molecules - proteins22
-
Chapter 3 - Biological molecules - nucleic acids12
-
Chapter 3 - Biological molecules - DNA replication and the genetic code10
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Chapter 3 - Biological molecules - Protein synthesis16
-
Chapter 4 - Enzymes21
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Chapter 4 - Enzyme inhibitors and cofactors10
-
Chapter 5 - Membranes10
-
Chapter 5 - Diffusion6
