Rana pipiens
The role of mineralized tissue in the buffering of lactic acid during anoxia and exercise in the leopard frog Rana pipiens
... Our purpose was to determine whether the skeleton and endolymphatic system of the leopard frog Rana pipiens play roles in buffering lactic acid accumulated during anoxic submergence and strenuous exercise. ...
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Metabolic effects of dehydration on an aquatic frog, Rana pipiens
... Cellular responses to dehydration were analyzed in six organs of leopard frogs Rana pipiens. Frogs at 5 ˚C endured the loss of up to 50 % of their total body water content but water contents of individual ...
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Skin peptides protect juvenile leopard frogs (Rana pipiens) against chytridiomycosis
... frog, Rana pipiens, we show here that injection of noradrenaline (norepinephrine) brings about a long-term depletion of skin peptides (initial concentrations do not recover until after day ...
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Contribution of eye retraction to swallowing performance in the northern leopard frog, Rana pipiens
... In this study we used cineradiography, electromyography, behavioral observations and muscle denervation experiments to investigate the contribution of eye retraction to swallowing performance in the northern leopard ...
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THE MODULATION OF FEEDING BEHAVIOR IN RESPONSE TO PREY TYPE IN THE FROG RANA PIPIENS
... in Rana pipiens, the plesiomorphic neural circuitry was ...in Rana pipiens synchronized with high-speed video studies, will allow measurement of the motor patterns generated during feeding on ...
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Slow death in the leopard frog Rana pipiens: neurotransmitters and anoxia tolerance
... temporaria, Rana pipiens) demonstrate an intermediate anoxia tolerance, their brains able to survive 4–5·h without oxygen at room temperature (Knickerbocker and Lutz, 2001; Lutz and Reiners, 1997) and at ...
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Effects of stretch on work and efficiency of frog (Rana pipiens) muscle
... We used the anterior tibialis occur during animal movement, a stretch that immediately muscle of leopard frogs Rana pipiens complex to measure preceded shortening enhanced work during sh[r] ...
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Physiological and morphological correlates of among individual variation in standard metabolic rate in the leopard frog Rana pipiens
... Other variables in addition to body-mass-adjusted organ mass may affect SMR, however. Here, we seek to understand potential mechanisms underlying among-individual variation in SMR. In a novel approach, we examine two ...
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Identification of myosin light chains in Rana pipiens skeletal muscle and their expression patterns along single fibres
... frogs, Rana pipiens, were purchased commercially (Charles Sullivan Inc, Nashville, TN, USA) and were kept at room temperature in 90 l aquaria containing dry, dark surfaces and recirculating filtered ...
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Isolation and Characterization of Viruses from the Kidneys of Rana pipiens with Renal Adenocarcinoma Before and After Passage in the Red Eft (Triturus viridescens)
... Cells were plated on cover slips in Leighton tubes test this hypothesis, cell suspensions from leopard for studies of direct outgrowth and inoculated into frog kidneys with tumors or pre[r] ...
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The Role of Lactic Acid Accumulation in Muscle Fatigue of Two Species of Anurans, Xenopus Laevis and Rana Pipiens
... Gastrocnemius muscles from both species, when stimulated directly to fatigue, accumulated lactic acid to a concentration of around 415 mg %, whether the muscle was taken from a fatigued [r] ...
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PARTHENOGENESIS AND GENETIC VARIABILITY. I. LINKAGE AND INBREEDING ESTIMATIONS IN THE FROG, RANA PIPIENS
... The information collected from gynogenetic and biparental control progeny included the date of metamorphosis, phenotype, and age attained if death occurred.-Linkage and inbre[r] ...
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Biosynthesis and axoplasmic transport of neurophysin in the hypothalamo neurohypophysial system of the grass frog Rana pipiens
... In this dissertation, experiments designed to study some specific aspects concerning the biosynthesis and axoplasmic transport of neurophysin in the hypothalamo-neurohypophysial system o[r] ...
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Active calcium transport in the skin of the frog Rana pipiens: kinetics and seasonal rhythms
... Seasonal rhythms occur in many other amphibian physiological functions related to hydromineral balance and endocrine function. The osmotic permeability of the skin of ranid frogs increases during the winter (Share and ...
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Ventilation and partitioning of oxygen uptake in the frog Rana pipiens: effects of hypoxia and activity
... Oxygen uptake MQ 2 from gas was considered to be equivalent to pulmonary Mo2, and MQ from water was considered to be cutaneous MQ • Effects of skin ventilation and activity The effect o[r] ...
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Seasonal Temperature Influence on Vagal Control of Diving Bradycardia in the Frog (Rana Pipiens)
... When restrained curarized frogs were first submerged, a rapid and pronounced bradycardia occurred; this bradycardia, however, was temporary, and after several minutes the heart rates inc[r] ...
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LABORATORY STUDIES BEARING ON PIGMENT PATTERN POLYMORPHISMS IN WILD POPULATIONS OF RANA PIPIENS
... to have significantly more spots than progeny of parents with low spot numbers, and by the finding (MERRELL 1965) that wild-type frogs within the range of Burnsi have fewer [r] ...
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Breathing in Rana Pipiens: the Mechanism of Ventilation
... Comparison of breathing behaviour variables as recorded from animals in air and in the blowhole apparatus In air N Mass g Frequency of buccal oscillations min"1 Frequency of lung ventila[r] ...
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The Photopositive Response of the Frog(Rana Pipiens) Under Photopic and Scotopic Conditions
... Both the theoretical and experimental results show much less interaction between intensity and the spectral response curve under scotopic than photopic conditions, and in both cases unde[r] ...
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TWO SEX-LINKED LOCI IN THE LEOPARD FROG, RANA PIPIENS
... However, among the offspring of males heterozygous for peptidase C (Pep-C) or superoxide dismu- tase 1 (SOD-I), male progeny tend to inherit one allele, whereas female pr[r] ...
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