acid–base regulation
- Ammonia excretion in the marine polychaete Eurythoe complanata (Annelida)
Summary: Ammonia excretion in a common marine burrowing polychaete occurs via dentrically branched and well-vascularized branchiae, which exhibit a high abundance of three ammonia transporters and a Rhesus-like protein.
- Preferential intracellular pH regulation: hypotheses and perspectives
Summary: Preferential intracellular pH regulation confers exceptional tolerance to a severe acute respiratory acidosis. This trait may represent a basal pattern of acid–base regulation used by developing vertebrates that is lost or retained in adults.
- Embryonic common snapping turtles (Chelydra serpentina) preferentially regulate intracellular tissue pH during acid–base challenges
Summary: Embryonic turtles preferentially regulate tissue pH in the absence of blood pH regulation during acid–base disturbances. This pattern of acid–base regulation has never been observed before in amniotes.
- Ambient CO2, fish behaviour and altered GABAergic neurotransmission: exploring the mechanism of CO2-altered behaviour by taking a hypercapnia dweller down to low CO2 levels
Highlighted Article: Although high levels of CO2 have repeatedly been linked to behavioural disturbance in marine fish, reducing CO2 concentration alters behaviour in a hypercapnia-dwelling fish, suggesting that neural ion balance is fine-tuned to prevailing CO2 conditions.