Topic
Toad
About: Toad is a research topic. Over the lifetime, 1624 publications have been published within this topic receiving 28732 citations.
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TL;DR: The polyamines putrescine, spermidine, and spermine, are able to potentiate the toxicity of malathion in Bufo arenarum Hensel toad larvae and elevated up to 13-fold the mortality produced by this organophosphorus compound.
Abstract: The polyamines putrescine, spermidine, and spermine, are able to potentiate the toxicity of malathion in Bufo arenarum Hensel toad larvae. This action is synergistic and maximal with spermidine, which elevated up to 13-fold the mortality produced by this organophosphorus compound. Spermidine increased the degree of inhibition of acetylcholinesterase activity elicited by malathion, and impaired the recovery of this activity at the end of the treatment. Spermidine had no effect on the enzyme when applied alone. Toxic effects were also observed with the polyamines themselves when applied at concentrations similar to the intracellular levels described for rapid-growing organisms.
27 citations
TL;DR: The changes in DLC levels induced by the short- as well as long-term perturbations in the animal environmental salinity together with the seasonal differences suggest that DLC in the toad is involved in water and salt homeostasis of these animals, but may also participate in other unknown functions.
27 citations
TL;DR: The cuticle was formed more rapidly after total hypophy sectomy than after adenohypophysectomy, and higher doses of aldosterone or ACTH are needed to cause shedding of the cuticle in the totally hypophysectomized toad than in the aden ohypophy Sectomy, where oxytocin is injected simultaneously.
26 citations
TL;DR: The antidiuretic response to an osmotic load and an increased permeability of the urinary bladder to water may largely depend upon a functioning preoptic-neurohypophysial system, but in the absence of the neurohypophysis the system appears unable to exert its functions in the water economy of the toad.
26 citations
26 citations