..., and how they are influenced through stretch. We used the anterior tibialis muscle of leopard frogs ( Rana pipiens complex) to measure the oxygen consumed and work done during shortening contractions that were immediately preceded by either a brief stretch (5% muscle length over 25 ms) or an isometric...

...Daniel E. Warren; Donald C. Jackson SUMMARY To evaluate the role of mineralized tissues of the leopard frog in buffering acid, we analyzed the composition of femur and auditory capsule, the latter of which encloses a portion of the endolymphatic lime sacs, and investigated the extent to which...

... underlying among-individual variation in SMR. In a novel approach, we examine two potential proximate correlates of variation in SMR, in addition to organ mass,in leopard frogs Rana pipiens . We measured SMR of the frogs, then measured the masses of energetically expensive organs, serum-free T4 thyroxine...

...Thomas A. Churchill; Kenneth B. Storey ABSTRACT Cellular responses to dehydration were analyzed in six organs of leopard frogs Ranapipiens . Frogs at 5 °C endured the loss of up to 50 % of their total body water content but water contents of individual organs were strongly defended. Skeletal muscle...