thermoregulation by the skin
TRANSCRIPT
The Skin’s Role in the Homeostasis of Body
TemperatureDevelopment CourseDr. Helen Mergenthal
HOMEOSTASIS • Internal conditions are not absolute• Limited range• Vary around a set point
Negative feedback is when the
body senses a change and tries
to reverse it back to stability.
Feedback Loops consists of:• Homeostatic range for a variable• Receptors• Control center• Effector
• Homeostatic range: 37 degrees Centigrade or 98.6 degrees Fahrenheit (plus or minus 0.5 degrees)
• The body’s thermostat is a part of the brain called the Hypothalamus.
• Above 37.5 degrees Centigrade, homeostasis is disturbed.
OpenStax College. (2013, June 19). Anatomy & Physiology. Retrieved from the Connexions Web site: http://cnx.org/content/col11496/1.6/
If the body temperature goes below 36.5 degrees Centigrade (97.7 degrees Fahrenheit)• Blood vessels in skin
constrict• Sweat glands stay inactive• Shivering, involuntary
muscle contractions, releases heat