Diffusion Flashcards
1
Q
What does rate of diffusion depend upon?
A
Diffusion resistance
Area available for exchange
Concentration gradient
2
Q
What does diffusion resistance depend upon?
A
Nature of molecule
The barrier
Path legnth
3
Q
What does area available for exchange depend upon? Why might this increase in metabolically active tissues?
A
Depends on capillary density- is higher in metabolically active tissues to supply more blood
4
Q
What does concentration gradient depend upon?
A
Rate of use by the tissue
Rate of blood flow through capillary bed- this is known as perfusion rate
5
Q
What is avergae 70kg male perfusion rate at rest?
A
5l/min
6
Q
What is average 70kg male perfusion rate during exercise?
A
25l/min
