Biology Flashcards
1
Q
Factors that effect Gaseous exchange
A
SA/V ratio
Diffusion distance
Steepness of concentration gradient
2
Q
How are gills adapted to gaseous exchange
A
Huge SA
rich blood supply
Single cell layer
Flow of water maintains a water potential gradient
3
Q
What makes a huge SA in gills
A
Lamellae
4
Q
What makes a short diffusion pathway
A
Thin gill filaments
5
Q
What supplies the gills with blood
A
The capillaries in the fillaments
6
Q
What is countercurent flow
A
When water flows in one direction and the blood flows in the other direction. Equilibrium will mever be reached. Most of the 1% of oxygen in the water will move into the fishes bloodstream
