Results 51 to 60 of about 6,670 (154)

Cryo-Electron Tomography Reveals the Complex Ultrastructural Organization of Multicellular Filamentous Chloroflexota (Chloroflexi) Bacteria

Frontiers in Microbiology, 2020
The cell biology of Chloroflexota is poorly studied. We applied cryo-focused ion beam milling and cryo-electron tomography to study the ultrastructural organization of thermophilic Roseiflexus castenholzii and Chloroflexus aggregans, and mesophilic “Ca ...
Vasil A. Gaisin, Vasil A. Gaisin, Romain Kooger, Denis S. Grouzdev, Vladimir M. Gorlenko, Martin Pilhofer   +5 more
doaj   +1 more source

All Is Relative—A Call for Considering “Physiologically Informed” Control Conditions to Improve the Mechanistic Understanding of the Effects of Physical Exercise on Cognition

Scandinavian Journal of Psychology, EarlyView.
ABSTRACT There is a growing interest in elucidating the mechanisms that drive the benefits of physical exercise on cognitive performance. A key element for a better understanding of a particular phenomenon (e.g., the mediators of the exercise‐cognition interaction) is the selection of an appropriate control condition/group as the basis for causal ...
Fabian Herold, Benjamin Tari, Sylwester Kujach, Olivier Dupuy, C. Shawn Green, Thomas Gronwald, Matthew Heath   +6 more
wiley   +1 more source

Sensory Processing and Integration at the Carotid Body Tripartite Synapse: Neurotransmitter Functions and Effects of Chronic Hypoxia

Frontiers in Physiology, 2018
Maintenance of homeostasis in the respiratory and cardiovascular systems depends on reflexes that are initiated at specialized peripheral chemoreceptors that sense changes in the chemical composition of arterial blood.
Erin M. Leonard, Shaima Salman, Colin A. Nurse   +2 more
doaj   +1 more source

Modulation of cerebral blood flow and cognition by hyperthermia and hypoxia: An electroencephalographic event‐related potentials perspective

Experimental Physiology, EarlyView.
Abstract Cerebral blood flow (CBF) is essential for sustaining neuronal metabolism and cognitive performance; however, the precise relationship between perfusion and cognition remains unclear. Although ageing and disease are associated with progressive declines in CBF and cognitive impairment, the acute effects of altered CBF under environmental ...
Hiroki Nakata, Shigehiko Ogoh, Manabu Shibasaki   +2 more
wiley   +1 more source

Time‐course analysis of cerebral circulation and cardiorespiratory responses to acute central blood volume reduction in healthy young males

Experimental Physiology, EarlyView.
Abstract Central blood volume (CBV) reduction challenges circulatory and respiratory homeostasis, particularly during the initial compensatory phase (0–2 min), when rapid physiological adaptations occur. In this study, we examined dynamic cardiorespiratory responses to CBV reduction using lower‐body negative pressure (LBNP) in 11 healthy young males ...
Marina Feeley, Tomoki Watada, Go Ito, Ai Shimada, Toru Sawai, Hideomi Nakata, Shingo Otsuki, Tadayoshi Miyamoto   +7 more
wiley   +1 more source

Challenges in the Management of Massive Carotid Body Tumor

Case Reports in Otolaryngology
The carotid body paraganglioma is a rare benign neoplasm arising from the chemoreceptor cells of the carotid bulb. The carotid body has the largest collection of paraganglia in the head and neck with 60–70% of head and neck paraganglioma. Paraganglia are
Oluwapelumi Olusoga-Peters, Moses Ayodele Akinola, John Ifeanyi Nwadiokwu, Florence Oguntade   +3 more
doaj   +1 more source

GPCRs Direct Germline Development and Somatic Gonad Function in Planarians.

PLoS Biology, 2016
Planarians display remarkable plasticity in maintenance of their germline, with the ability to develop or dismantle reproductive tissues in response to systemic and environmental cues. Here, we investigated the role of G protein-coupled receptors (GPCRs)
Amir Saberi, Ayana Jamal, Isabel Beets, Liliane Schoofs, Phillip A Newmark   +4 more
doaj   +1 more source

TASK inhibition by mild acidosis increases Ca²⁺ oscillations to mediate pH sensing in rat carotid body chemoreceptor cells. [PDF]

Am J Physiol Lung Cell Mol Physiol, 2023
Kim D, Hogan JO, White C.
europepmc   +1 more source

Pulmonary arterial mechanoreceptors mediate sustained sympathoexcitation during high altitude hypoxia in humans

Experimental Physiology, EarlyView.
Abstract Sympathetic nervous system activation is a hallmark of high‐altitude hypoxia, yet the afferent mechanisms remain incompletely defined. We examined the relative contributions of pulmonary arterial mechanoreceptors and carotid chemoreceptors – two excitatory pathways co‐activated by hypoxia – to sustained sympathoexcitation at altitude.
Michiel T. Ewalts, Lydia L. Simpson, Jack S. Talbot, Elliott J. Jenkins, Travis D. Gibbons, Connor A. Howe, Lauren E. Maier, Emily R. Vanden Berg, Alex M. Williams, Philip N. Ainslie, Samuel J. Oliver, Craig D. Steinback, Mike Stembridge, Jonathan P. Moore   +13 more
wiley   +1 more source

The role of acid‐base balance in cerebrovascular and ventilatory responses to CO2 during 10 h normobaric hypoxia

The Journal of Physiology, EarlyView.
Abstract figure legend During 10 h exposures to normobaric hypoxia exposure there was a selective leftward shift in ventilatory response to hyperoxic hypercapnic rebreathing, but not the cerebrovascular response. The key findings are that the resetting of the central chemoreflex to lower PCO2${P_{{\mathrm{C}}{{\mathrm{O}}_2}}}$ during early hypoxic ...
Holly Barclay, Saptarshi Mukerji, Bengt Kayser, Jui‐Lin Fan   +3 more
wiley   +1 more source