NN+Sweatology+Notes

Sweatology Notes
A. The "Interior Coolant" (sweatology) - the sweating system is adjustable and can be reproduced for closer study - can take being overcooled, but cannot stand to be overheated - intolerance for heat creates a need for a cooling system - Dr. Jablonski says that the ability to sweat has made humans the way they are because we found a way to release the heat created by our brains - sweat is inhibited by hair, the reason why humans are not matted with thick hair like a dog... - in temperate climates, heat can be released into the air from the skin, but in hot weather, or when human excercise, the heat is too much for the air to absorb, causing the nerves to tell the brain to release sweat - humidity increases sweating - sunburns and dehydration reduce sweating - Craig Crandall says that "age, sex, genes, weight and shape play a role... so does nonexcerecise activity" - clothing also plays a role = less clothing does not help, the body absorbs more heat from the environment when there is no clothing - women with menopause sweat more because the brain gets "trigger happy" (sweatology) - at age 60, men and women sweat less, even if they are in good condition, putting the elderly at more danger in a heat wave of heat stroke - obesity has little effect on sweat rate because it serves as an insulator of outside heat, but heat has a harder time getting out of the body. however, study shows that people can grow extra sweat glands to cope with these conditions

B. Heat Acclimation - routinely when atheletes trian in hot weather - body heats up and produces more sweat, realeasing more salt - at first person feels miserable - as body adjusts, body sweats more, but less salt is released, and body temperatures drop - endurance improves - global warming will be like moving from canada to florida for most people (Dr. Crandall)

C. Dr. Nina G. Jablonski - has been published in the __University of California Press__, the article was called "Skin: A Natural History" - age 53 - heads the anthropology department at Pennsylvania State University - is a primatologist, evolutionary biologist, and a paleontologis - goes all over the world to study how early humans dealt with climate change - ([|http://www.nytimes.com/2007/01/09/science/09conv.html?ex=1325998800&en=23069718dfd4d4b3&ei=5090&partner=rssuserland&emc=rss)]

D. Dr. Craig Crandall - director of the Thermoregulation Laboratory at Presbyterian Hospital in Dallas, Texas - "doctor of sweat" - ([|http://www.wjbf.com/midatlantic/jbf/news_index/health_news.apx.-content-articles-JBF-2007-08-17-0006.html)]

E. Dr. Field's Notes - the bigger the sweat glands, the more sweat - the brain sends a signal to the sweat glands through the nerves when the skin is too hot - too hot= 90's, internal temperature - 2-4 million sweat glands