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Articles 31 - 47 of 47
Full-Text Articles in Physiology
The Effects Of Rectal Temperature And Hydration Status On Perceptual Ratings In Dehydrating Males, Ethan A. Talbot
The Effects Of Rectal Temperature And Hydration Status On Perceptual Ratings In Dehydrating Males, Ethan A. Talbot
Honors Scholar Theses
Athletes push the limits of what the human body can handle every day. When they exercise in the heat, they can attain dangerous levels of internal temperature and dehydration. Since athletes are sometimes not aware when they are experiencing severe hyperthermia or hypohydration, it is of interest to anyone who exercises in the heat to study whether athletes are consciously aware that they are approaching dangerous physiological limits. This study compares the perceptual values of athletes exercising in the heat to the changes in their internal temperature and hydration status, to see if athletes can reliably predict their heat and …
Salinity Preference Of Alaskan Threespine Stickleback: Test For Divergence In Halotaxis Between Ancestral And Landlocked Populations, David Fryxell, Eric T. Schultz
Salinity Preference Of Alaskan Threespine Stickleback: Test For Divergence In Halotaxis Between Ancestral And Landlocked Populations, David Fryxell, Eric T. Schultz
EEB Articles
Glacial retreat during the Pleistocene caused landlocking of anadromous Alaskan threespine stickleback, Gasterosteus aculeatus, furnishing a natural ‘experiment’ in osmoregulatory divergence. The objective of this study was to assess the effects of individual acclimation and population divergence on salinity preference. Full-sibling families of marine, anadromous, and freshwater-landlocked populations of stickleback were reared in common environments until 3 weeks post-hatch, then were split and acclimated to low or high salinity. At 6 to 8 weeks of age the six experimental groups were tested for salinity preference in a tank that offers fish a choice of compartments with different salinities arranged …
Modulation Of Hypoglossal Motoneurons By Nitric Oxide, Justin Philip Benoit
Modulation Of Hypoglossal Motoneurons By Nitric Oxide, Justin Philip Benoit
Master's Theses
Obstructive sleep apnea (OSA)- the occurrence of repetitive episodes of airway obstruction during sleep- is considered a major health problem affecting up to 9% of adults in the United States (Parish & Somers, 2004). The hypoglossal motor nucleus (HMN) controls genioglossus muscle tone and is critically important for maintaining airway patency; loss of excitatory input to the HMN during sleep results in disfacilitation of hypoglossal motoneurons, increased airway resistance and contributes to the development of OSA (Horner R. L., 2007). However, a fundamental question of sleep medicine that remains unresolved is what mechanisms help maintain airway patency during sleep? A …
Changes In The Proliferation Of The Subventricular Zone Neural Stem Cell Pool Throughout Aging In The Murine Brain, Olayinka Edwards
Changes In The Proliferation Of The Subventricular Zone Neural Stem Cell Pool Throughout Aging In The Murine Brain, Olayinka Edwards
Honors Scholar Theses
Previous studies regarding subventricular zone (SVZ) neural stem cells (NSCs) have either observed global changes in the SVZ niche containing NSCs or an impure NSC population. By imaging wholemount preparations of mouse brains and staining with molecular markers specific for proliferating NSC nuclei, the study was able to give a more accurate depiction of the SVZ NSC population than its predecessors. This study will quantify the percentage of proliferating NSCs at various ages of adult murine brain development in order to elucidate a possible correlation between NSC division kinetics and the declining neurogenic output witnessed with aging.
Changes In Mirna Expression In A Model Of Microcephaly, Shan Parikh
Changes In Mirna Expression In A Model Of Microcephaly, Shan Parikh
Honors Scholar Theses
miRNAs function to regulate gene expression through post-transcriptional mechanisms to potentially regulate multiple aspects of physiology and development. Whole transcriptome analysis has been conducted on the citron kinase mutant rat, a mutant that shows decreases in brain growth and development. The resulting differences in RNA between mutant and wild-type controls can be used to identify genetic pathways that may be regulated differentially in normal compared to abnormal neurogenesis. The goal of this thesis was to verify, with quantitative reverse transcriptase polymerase chain reaction (qRT-PCR), changes in miRNA expression in Cit-k mutants and wild types. In addition to confirming miRNA expression …
Investigating The Diversity Of Radial Glia Fates In The Rat Neocortex, Abraham William Aron
Investigating The Diversity Of Radial Glia Fates In The Rat Neocortex, Abraham William Aron
Honors Scholar Theses
Radial Glia (RG) are a mitotically active population of cells which reside within the ventricular zone at the lateral ventricle and give rise to the pyramidal neurons and astrocytes of the neocortex. Through cellular divisions, RG produce two daughter cells, one which resides in the ventricular zone and becomes another RG while the other is an immature progenitor which migrates away from the ventricle and populates the growing cortex. RG have been found to be a heterogeneous population of cells which express different surface antigens and genetic promoters which may influence the cellular fate of their progeny. In this study …
Alterations In The Cellular Composition Of The Mouse Bladder Following Ovariectomy, Partial Bladder Outlet Obstruction, And Aging, Diane Holly Smith
Alterations In The Cellular Composition Of The Mouse Bladder Following Ovariectomy, Partial Bladder Outlet Obstruction, And Aging, Diane Holly Smith
Honors Scholar Theses
Detrusor underactivity (DU) increases susceptibility to urinary retention and accordingly further complicates the management of urinary incontinence. Bladder muscle stretch, a lack of estrogen, and aging are 3 notable DU risk factors. The aim of this research is to better characterize the changes in cellular composition of the bladder that result from these 3 risk factors to gain a better understanding of DU pathogenesis and pathobiology. This research focuses on the effects of a lack of estrogen while also providing an outline for determining the effects of bladder muscle stretch and aging on the cellular composition of the bladder.
Oxygen Supplementing, Biocompatible Outer Membranes For Enhanced Performance Of Implantable Glucose Sensors, Hardeep Singh
Oxygen Supplementing, Biocompatible Outer Membranes For Enhanced Performance Of Implantable Glucose Sensors, Hardeep Singh
Honors Scholar Theses
Lack of linearity and sensitivity, oxygen dependence, biofouling and tissue inflammation hinder the development of implantable biosensors for continuous monitoring of glucose. Herein, we report the development of stacked outer membranes based on LBL/PVA hydrogels that improve sensor sensitivity, linearity, oxygen independence and counter biofouling and inflammation. While the inner LBL membrane affords tunable diffusivity, the outer PVA is capable of releasing anti-inflammatory drugs/tissue response modifying agents to counter acute and chronic inflammation, and to induce neo-angiogenesis at the implant site. Sensors were fabricated by immobilizing GOx enzyme on top of 50 μm platinum wires, followed by deposition of stacked …
Differentiation Of Human Embryonic Stem Cell (Hesc) Derived Pyramidal Neurons, Eagan Jacqueline
Differentiation Of Human Embryonic Stem Cell (Hesc) Derived Pyramidal Neurons, Eagan Jacqueline
Honors Scholar Theses
The mammalian cerebral neocortex is a complex six-layered structure containing multiple types of neurons. Pyramidal neurons of the neocortex are formed during development in an inside-out manner, by which deep layer (DL) neurons are generated first, and upper layer (UL) neurons are generated last. Neurons within the six-layered neocortex express unique markers for their position, showing whether they are subplate, deep layer, upper layer, or Cajal-Retzius neurons. The sequential generation of cortical layers, which exists in vivo, has been partially recapitulated in vitro by differentiation of mouse embryonic stem cells (Gaspard et al., 2008) and human embryonic stem cells (hESC) …
Head And Neck Embryology: An Overview Of Development, Growth And Defect In The Human Fetus, Allison Baylis
Head And Neck Embryology: An Overview Of Development, Growth And Defect In The Human Fetus, Allison Baylis
Honors Scholar Theses
The purpose of this research is to explore the growth and formation of the head and neck from embryological development through puberty in order to understand how this knowledge is necessary for the development of dental and medical treatments and procedures. This is a necessary aspect of the medical and dental school curriculum at the University of Connecticut Health Center Schools of Medicine and Dental Medicine that needs to be incorporated into the current study of embryology for first-year students. Working with Dr. Christine Niekrash, D.M.D, this paper will cover the embryology and growth of the head, face and oral …
Effects Of Estrogen On Muscle Damage In Response To An Acute Resistance Exercise Protocol, Megan R. Wolf
Effects Of Estrogen On Muscle Damage In Response To An Acute Resistance Exercise Protocol, Megan R. Wolf
Honors Scholar Theses
Creatine Kinase (CK) is used as a measure of exercise-induced muscle membrane damage. During acute eccentric (muscle lengthening) exercise, muscle sarcolemma, sarcoplasmic reticulum, and Z-lines are damaged, thus causing muscle proteins and enzymes to leak into the interstitial fluid.
Strenuous eccentric exercise produces an elevation of oxygen free radicals, which further increases muscle damage. Muscle soreness and fatigue can be attributed to this membrane damage. Estradiol, however, may preserve membrane stability post-exercise (Brancaccio, Maffulli, & Limongelli, 2007; Carter, Dobridge, & Hackney, 2001; Tiidus, 2001). Because estradiol has a similar structure to Vitamin E, which is known to have antioxidant properties, …
Salivary Cortisol, Psychological Stress And Depressive Symptoms Among Patients Undergoing Colon Cancer Screenings, Allyson Reid
Salivary Cortisol, Psychological Stress And Depressive Symptoms Among Patients Undergoing Colon Cancer Screenings, Allyson Reid
Honors Scholar Theses
As the second leading cause of cancer-related deaths in the United States, colon cancer has a high cure rate if detected early by a colonoscopy (U.S.
Cancer Statistics Working Group, 2007). However, more than 41 million at-risk Americans are not properly receiving colonoscopy screenings according to the recommendations of the Center for Disease Control. This study provides insight into the physiological and psychological benefits of the colonoscopy procedure over and above cancer detection and prevention. Thirty-six patients receiving colonoscopic screening at the University of Connecticut Health Center participated in this study. A questionnaire battery that assessed perceived stress, depressive symptoms, …
Intrinsic Ph-Sensitivity Of Cells In The Retrotrapezoid Nucleus: Possible Role Of Glia In Respiratory Drive, Nicole Edwards
Intrinsic Ph-Sensitivity Of Cells In The Retrotrapezoid Nucleus: Possible Role Of Glia In Respiratory Drive, Nicole Edwards
Honors Scholar Theses
An increase in carbon dioxide (CO2) and protons (H+) are the primary signals for breathing. Cells that sense changes in CO2/H+ levels and increase breathing accordingly are located in a region of the caudal medulla oblongata called the retrotrapezoid nucleus (RTN). Specifically, select RTN neurons are intrinsically pH sensitive and send excitatory projections to the respiratory rhythm generator to drive breathing. Glial cells in the RTN are thought to contribute to this respiratory drive, possibly by releasing ATP in response to increases in CO2/H+ levels.
However, pH sensitivity of RTN glial cells has yet to be determined.
Therefore, the goal …
Colocalization And Distribution Of Hcn4 Channels And A Maguk Protein In Mammalian Sinoatrial Myocytes, Padmastuti Akella
Colocalization And Distribution Of Hcn4 Channels And A Maguk Protein In Mammalian Sinoatrial Myocytes, Padmastuti Akella
Honors Scholar Theses
The sinoatrial node is known as the pacemaker of the heart. It controls the rate at which action potentials are generated and propagate through the sinoatrial myocytes. This thesis is an attempt to identify the colocalization of a specific ion channel (HCN4 channel) with a class of scaffolding protein (MAGUK proteins) within the sinoatrial myocyte. The colocalization of these two variables was performed using immunocytochemistry on murine sinoatrial myocytes and experimental results revealed the existence of a strong colocalization between the two variables. Images collected from the confocal microscope and analyzed using ImageJ software revealed a strong dependent correlation between …
Rate Of Depletion Of Liver Vitamin A In Chicks, Weanling Rabbits And Weanling Rats Fed Vitamin A-Free Diets, J.J. Tlustohowicz, R.C. Hall, J.E. Rousseau, H.I. Frier, S. Donoghue
Rate Of Depletion Of Liver Vitamin A In Chicks, Weanling Rabbits And Weanling Rats Fed Vitamin A-Free Diets, J.J. Tlustohowicz, R.C. Hall, J.E. Rousseau, H.I. Frier, S. Donoghue
Storrs Agricultural Experiment Station
No abstract provided.
Cerebrospinal Fluid Pressure And Squamous Metaplasia In Chronic Hypovitaminosis A Of The Male Weanling Rat, H.I. Frier, R.C. Hall Jr., J.E. Rousseau Jr., S.W. Nielsen
Cerebrospinal Fluid Pressure And Squamous Metaplasia In Chronic Hypovitaminosis A Of The Male Weanling Rat, H.I. Frier, R.C. Hall Jr., J.E. Rousseau Jr., S.W. Nielsen
Storrs Agricultural Experiment Station
No abstract provided.
Cerebrospinal Fluid Pressure In Weanling Rabbits With Chronic Plumbism, R.C. Hall Jr., H.I. Frier, R.S. Bartlett, J.E. Rousseau Jr.
Cerebrospinal Fluid Pressure In Weanling Rabbits With Chronic Plumbism, R.C. Hall Jr., H.I. Frier, R.S. Bartlett, J.E. Rousseau Jr.
Storrs Agricultural Experiment Station
No abstract provided.