Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Physiology
Circadian Regulation Of The Timing Of Pre-Ovulatory Luteinizing Hormone Surge In Mice And Hamsters, Ajay Kumar
Circadian Regulation Of The Timing Of Pre-Ovulatory Luteinizing Hormone Surge In Mice And Hamsters, Ajay Kumar
Doctoral Dissertations
Endogenous daily (circadian) oscillators ensure the proper timing of physiological and behavioral processes that are essential to health. A set of core clock genes and their protein products function in transcriptional/translational feedback loops (TTFLs) that time and coordinate vital homeostatic, cognitive, and hormonal processes. A master pacemaker in the suprachiasmatic nucleus (SCN) coordinates circadian function throughout the organism. Investigating the causal role of genetically defined cell types in the suprachiasmatic nucleus for circadian rhythms is essential to understand how an animal’s physiology is temporally organized. This thesis explores the role of molecular clocks within particular cell types in regulating physiology. …
Physiology Of A Basal Vertebrate, The Sea Lamprey (Petromyzon Marinus): Osmoregulation And Corticosteroid Action, Ciaran A. S. Shaughnessy
Physiology Of A Basal Vertebrate, The Sea Lamprey (Petromyzon Marinus): Osmoregulation And Corticosteroid Action, Ciaran A. S. Shaughnessy
Doctoral Dissertations
Lamprey represent the most basal living example of a vertebrate animal which regulates its internal fluid and ion homeostasis. This phylogenetic position among vertebrates makes lamprey an important model organism for understanding the basal state, and thus the evolution, of physiological systems such as the mechanisms of osmo- and ionoregulation and the endocrine factors controlling them. Sea lamprey (Petromyzon marinus) are an anadromous fish, migrating from freshwater (FW) to seawater (SW) as juveniles, then returning back upstream as mature adults to spawn. Surviving this transition from a solute-poor FW environment to a solute-concentrated SW environment requires many changes …
How Do Adult Songbirds Learn New Sounds? Using Neuromodulators To Probe The Function Of The Auditory Association Cortex, Matheus Macedo-Lima
How Do Adult Songbirds Learn New Sounds? Using Neuromodulators To Probe The Function Of The Auditory Association Cortex, Matheus Macedo-Lima
Doctoral Dissertations
The ability to associate sounds and outcomes is vital in the life history of many species. Animals constantly assess the soundscape for cues associated with threats, competitors, allies, mates or prey, and experience is crucial for those associations. For vocal learning species such as humans and songbirds, learning sounds (i.e. perception and association learning) is also the first step in the process of vocal learning. Auditory learning is thought to depend on high-order cortical brain structures, where sounds and meaning are bound. In songbirds, the caudomedial nidopallium (NCM) is part of the auditory association cortex and is known to be …