Maintaining Homeostasis in Aquatic Env. Flashcards
1
Q
Define osmoregulation?
A
- maintenance of osmolarity within body’s normal operating limits
2
Q
What are the dominant ions in osmoregulation?
A
- NaCl
3
Q
Define ionoregulation
A
- movement of ions
4
Q
Why are osmoregulation and ionoregulation closely linked?
A
- ions are osmolytes
5
Q
What do iono and osmoregulation do?
A
- control internal ion concentrations in body fluids
6
Q
What is an osmoconformer?
A
- body fluid osmotic pressure changes with medium
7
Q
What is an osmoregulator?
A
- regulates internal osmotic concentrations
8
Q
What is ionic regulation?
A
- control body fluid solute concentrations (osmoconformers and osmoregulators use this)
9
Q
What does euryhaline mean?
A
- tolerant to wide range of external salt conc. (few fish)
10
Q
What does stenohaline mean?
A
- narrow tolerance range to external salt conc. (most fish)
