stress

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Sex Differences in Stress Responses

A recent study published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology presents evidence that altering the sex of just the fat body in heads of fruit flies (Drosophila) causes them to have stress responses similar to the opposite sex. Males and females vary in their response to stress. It turns…

Wednesday was the last day of the meeting that culminated in a closing banquet with an awards session to honor students who had exceptional presentations. What an impressive group of young comparative physiologists! ┬áThe plenary lecture was given by Dr. Steven Chown (Monash Univ, Australia). He spoke about climate change forecasts and continuing environmental changes…

Shivering is one mechanism by which heat is produced in the body. Heat production is called thermogenesis. Another mechanism is through nonshivering thermogenesis regulated by brown fat (i.e. adipose). This second type of heating mechanism kicks in when we need extra heat production such as a postnatal infant, someone developing a fever, an animal arousing…