Life Lines by Dr. Dolittle

Sponsored by the American Physiological Society

Archive for August 2019

Does size matter?

  When it comes to how blood vessels function, the answer is yes. A new study published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology examined this question for the first time in toads (Rhinella marina). Regulation of blood vessel diameter, and hence blood pressure, is a complex process involving a variety of factors that are secreted by cells in the vascular wall in addition to factors found […]

Continue Reading →

Polar bears summering on land exposed to more pathogens

Polar bears (Ursus maritimus) living near the southern Beaufort Sea are spending more time on land during the summer months than in years past as a result of climate change and melting sea ice. Researchers wanted to know whether bears that spent more time on land were exposed to more pathogens compared to those who spent more time on sea ice. Their results, published in the journal Physiological and Biochemical Zoology, showed […]

Continue Reading →

Did you know just how interesting shark rectal glands could be?

In case you missed Shark Week this year, I thought I would mention a cool fact about dogfish sharks (Squalus acanthias) that you probably did not learn about. I read an interesting article from a lecture given by Dr. John N Forrest Jr, M.D. that was published in 2016 in Transactions of the American Clinical and Climatological Association. Sharks have a complicated system for regulating water and salt balance in the […]

Continue Reading →