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- Brook salamanders<br />Hybridization<br />Morphology<br />Salamanders -- Missouri -- Onondaga Cave State Park (1)
- Calcium-binding proteins<br />Muscarinic receptors<br />Nanoparticles<br />Zinc oxide (1)
- Frogs -- Development<br />Frogs -- Evolution -- North America<br />Morphology (1)
- Frogs -- Vocalization -- North America<br />Hylidae -- Vocalization -- North America<br />Larynx -- Anatomy (1)
- Store-operated calcium entry (1)
Articles 1 - 4 of 4
Full-Text Articles in Biology
Zinc Oxide Nanoparticle Disruption Of Store-Operated Calcium Entry In A Muscarinic Receptor Signaling Pathway, Hsiu-Jen Wang
Zinc Oxide Nanoparticle Disruption Of Store-Operated Calcium Entry In A Muscarinic Receptor Signaling Pathway, Hsiu-Jen Wang
Masters Theses
"The influences of ZnO nanoparticles on cellular responses to activation of muscarinic receptors were studied in Chinese hamster ovary cells expressing the human M3 muscarinic acetylcholine receptor. ZnO particles (20 nm) induced cytotoxicity in a time and concentration-dependent manner: following a 24 h exposure, toxicity was minimal at concentrations below 20 µg/ml but virtually complete at concentrations above 28 µg/ml. ZnO particles did not affect antagonist binding to M3 receptors or allosteric ligand effects, but increased agonist binding affinity while eliminating guanine nucleotide sensitivity. At a noncytotoxic concentration (10 µg/ml), ZnO increased resting [Ca²⁺]i from 40 to 130 nM without …
Analysis Of Eurycea Hybrid Zone In Eastern Missouri, Bonnie Jean Beasley
Analysis Of Eurycea Hybrid Zone In Eastern Missouri, Bonnie Jean Beasley
Masters Theses
"Evolutionary mechanisms are often difficult to observe in action because evolution generally works slowly over time. Hybrid zones provide a unique opportunity to observe many evolutionary processes, such as reinforcement, because of the rapid changes that tend to occur in these zones. Salamanders provide an ideal model for examining the rapid changes in populations that result from hybridization because many closely-related species lack reproductive barriers. In Missouri, a well-documented hybridization zone exists among the two subspecies Eurycea longicauda longicauda (long-tailed salamander) and E. L. melanopleura (dark-sided salamander). These salamanders inhabit caves, limestone creek beds, and abandoned mine shafts. A closely …
Laryngeal Apparatus And Call Structure In North American Hylids, Barbara Ann Catherine Fears
Laryngeal Apparatus And Call Structure In North American Hylids, Barbara Ann Catherine Fears
Masters Theses
"Although the ecological implications and structure of frog calls have been the subject of much study, little is known about the association between the laryngeal apparatus morphology and call structure in North American hylids. In this study linear measurements of the laryngeal apparatus were captured and compared to the call structures of thirteen species of North American hylids. Species examined included: Pseudacris crucifer, P. triseriata, P. ocularis, Acris crepitans blanchardi, Hyla avivoca, H. cinerea, H. gratiosa, H. chrysoscelis, H. versicolor, H. squirella, H. femoralis, H. arenicolor, and H. eximia. Six homologous landmark points were identified, and the lengths between them …
The Role Of Skeletal Development In Body Size Evolution Of Two North American Frogs, Sarah Beth Havens
The Role Of Skeletal Development In Body Size Evolution Of Two North American Frogs, Sarah Beth Havens
Masters Theses
"In order to better understand the evolution of miniaturization in Acris blanchardi, a North American Hylid with a unique life history and of ecological interest in the United States. The development and ossification sequences of 48 larvae, 5 juveniles and 5 adult A. blanchardi were examined. The adult was described by Maglia et al. (2007) to be a miniature and to display morphological novelties. In addition, 44 larvae, 2 juvenile and 5 adults of Pseudacris crucifer a closely related frog that has been suggested to be a miniature, were examined. The cranial and postcranial adult elements of this species, as …