Oxygen Uptake Flashcards
1
Q
What is counter current exchhange?
A
water and blood flow in opposite direction (each unidirectional)
2
Q
What % extraction does counter current exchange allow?
A
- 80%
3
Q
Blood flows from the ____ artery to the ____ artery.
A
- afferent
- efferent
4
Q
Water flows from the ____ artery to the ____ artery.
A
- efferent
- afferent
5
Q
PO2 moves from ___ to ____
A
- high to low
6
Q
How does counter current exchange maximize O2 uptake?
A
- by maintaining relatively stable (delta)Po2 gradient
7
Q
What does the delta sign mean?
A
- difference between 2 lines (on graph)
- never reaches equilibrium
- stable gradient
8
Q
What does concurrent mean?
A
- blood and water flow in the same direction
9
Q
Where does concurrent exchange reach equilibrium?
A
- 50%
10
Q
What is lamellar SA (number) correlated with?
A
- O2 demand and lifestyle
11
Q
What is lamellar thickness inversely correlated with?
A
- O2 demand and lifestyle
12
Q
What is the characteristic of lamella in sluggish fish?
A
- thick and far apart
13
Q
What is the characteristic of lamella in active species?
A
- thin and closer
14
Q
What is the characteristic of lamella in very active species?
A
- very thin and close together
15
Q
What is “osmo”
A
saltwater solution
