Elasmobranchs Flashcards
1
Q
Elasmobranchs are ____ _____
A
- osmoconforming ionregulators (NaCl)
2
Q
What does it mean that elasmobranchs are slightly hyperosmotic?
A
- osmotic uptake of water with no water loss
3
Q
Elasmobranchs are hyperosmotic but ____ to seawater
A
- hypoionic (low)
4
Q
What is an elasmobranch’s osmolyte?
A
- urea and NaCl
5
Q
What are the 4 main processes of urea reabsorption?
A
- Na:urea cotransport
- Phoretin blocks urea reuptake
- COUNTER CURRENT BUNDLE
6
Q
The kidney cannot concentrate ____
A
- NaCl
7
Q
The kidney and gill are not for ____ ____.
A
NaCl secretion
