The effects of enforced activity on ventilation, circulation and blood acid-base balance in the aquatic gill-less urodele, Cryptobranchus alleganiensis; a comparison with the semi-terrestrial anuran, Bufo marinus.
A combined respiratory and metabolic acidosis occurs in the arterial blood immediately following 30 min of strenuous activity in the predominantly skin-breathing urodele, Cryptobranchus alleganiensis, and in the bimodal-breathing anuran, Bufo marinus, at 25 degrees C. In Bufo, the bulk of the post-exercise acidosis is metabolic in origin (principally lactic acid) and recovery is complete within 4-8 h. In the salamander, a lower magnitude, longer duration, metabolic acid component and a more pronounced respiratory acidosis prolong the recovery period for up to 22 h post-exercise. It is suggested that fundamental differences between the dominant sites for gas exchange (pulmonary versus cutaneous), and thus in the control of respiratory acid-base balance, may underline the dissimilar patterns of recovery from exercise in these two species.
D000136:Acid-Base Equilibrium; D000818:Animals; D001639:Bicarbonates / Q000097:blood; D002024:Bufo marinus / Q000502:physiology; D006439:Hemodynamics; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000097:blood; D009043:Motor Activity / Q000502:physiology*; D012119:Respiration; D014562:Caudata / Q000502:physiology*
D001639:Bicarbonates; D007773:Lactates