Initial stages of hibernation: is cold acclimatization necessary

Increased connexin43 gap junction protein in hamster cardiomyocytes during cold acclimatization and hibernation.

OBJECTIVE The physiology of hibernation is characterized by dramatic reductions of heart rate, respiration, metabolism, blood pressure and body temperature and by resistance to ventricular fibrillation. Gap junctions in the heart provide low resistance pathways, facilitating electrical and metabolic coupling between cardiac muscle cells for coordinated action of the heart and tissue homeostasis...

Cold Acclimatization in Eskimo

0 N EXPOSURE to cold the body has a complicated physiological problem to solve. There is a limit to the heat it can produce to provide for an increased heat loss and during exposure of much severity a heat deficit is incurred. While peripheral tissues are cooling, the central body temperature must be kept within a very narrow range if the function of vital organs is to be maintained. If the acc...

Acclimatization to Cold in Humans

The circulation in cold acclimatization.

The hand and forearm blood flow of the Eskimo has been found to be greater than that of a control group of white persons in a temperate climate both at rest at an ambient temperature of 20 C. and during acute cold exposure. Under cold stress, rectal temperature was better maintained in the Eskimos, though certain deep muscle temperatures fell more than they did in the white men because of the g...

Chamber cold acclimatization in man.

CHAMBER COLD ACCLIMATIZATION IN MAN