Life Lines by Dr. Dolittle

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Tag Archive for ‘physiology’

Experimental Biology 2019

The annual 2019 Experimental Biology conference starts in 2 days! I am looking forward to the myriad of comparative physiology sessions at this year’s meeting. Sunday will feature trainee presentations on a variety of topics ranging from how the gut microbiome shifts in ground squirrels with the seasons, insulin resistance in horses, and muscle performance of lizards. Monday will be a jam-packed day filled with topics on how ectotherms regulate […]

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Historical perspectives on homeostasis

In a new article published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology, Dr. David S. Goldstein (National Institutes of Health) presents an elegant historical perspective on homeostasis. Walter B. Cannon (1871-1945) was a physiologist at Harvard Medical School who is credited with coining the term “homeostasis” to describe how the body attempts to regulate itself to stay healthy. The ability for the body to regulate the […]

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Adapting to rising temperatures

In a new review article published in Physiology, Dr. Jonathon Stillman from San Francisco State University explores how populations of animals and humans may respond to increasing frequency of heat waves. According to Dr. Stillman, the past decade has produced some of the hottest years on record, resulting in the loss of human and animal life. Both the length and intensity of these heat waves are expected to increase, which […]

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Could zinc be involved in forming kidney stones?

Zinc is a micronutrient that is essential for normal protein production and for various enzymes to function properly in the body. Levels are important to regulate because too much can be toxic to the kidneys whereas too little can lead to problems with immune and metabolic function as well as infertility. In a new study published in American Journal of Physiology – Renal Physiology, researchers were interested in how zinc […]

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Alligator snorkeling

I read an interesting article in Live Science about a unique way a group of American alligators use to survive periods of freezing water, for a few days at least. As the temperature drops, the animals stick their nose out of the water and are thus able to breathe through the ice. During cold months the alligators also reduce their metabolism, a process called brumation, which is different from hibernation […]

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Breathing air

Researchers interested in the evolution of air breathing in bony fishes (Osteicthyes) recently published a fascinating review in the Physiologist. The ability to breathe air made life on land as we know it possible. What is interesting though is that the ability to breathe air actually evolved independently possibly 38-67 times in history. Currently, there are over 400 air-breathing fishes belonging to the Sarcopterygii and Actinopterygii classes. To adapt to life on land, […]

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Lack of sleep stresses out birds too

Birds show signs of stress resulting from sleep loss. A new study published in Physiological and Biochemical Zoology shows that zebra finches who are sleep deprived have increased expression of inflammatory genes in their fat tissues, spleen and hippocampus region of the brain along with  increased levels of circulating stress hormones. The hippocampus is the region of the brain associated with long term memory formation. I wonder if sleep deprived birds are […]

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