Freshwater Fish MRCS

batch3

Dec 7

Freshwater Fish MRCs

To the tune of “Easy on Me” by Adele

[Verse 1]
Acid secreting cells pump protons out
Which acidifies the water that surrounds
Sodium is kept low inside the cell
Which will create both a chemical and electrical force to
Drive sodium in

[Chorus]
Freshwater fishes
Are constantly faced with ion loss
And water gain
They must constantly
Do ion uptake
To osmoregulate

[Verse 2]
Enac on the apical membrane
Allows for sodium entry
NHE brings in a sodium
In exchange for a proton that combines with NH3
Moved out by the Rhesus protein

[Chorus]
Freshwater fishes
Are constantly faced with ion loss
And water gain
They must constantly
Do ion uptake
To osmoregulate

[Bridge]
Base secreting cells
Secrete bicarbonate
And both these cells
Rely on carbonic anhydrase

[Chorus]
Freshwater fishes
Are constantly faced with ion loss
And water gain
They must constantly
Do ion uptake
To osmoregulate

Biology 4X03: Environmental Physiology