Chapter 2: Temperature

Temperature refers to the degree of heat or cold in an object or a human body. In humans, the brain’s hypothalamus acts as the body’s thermostat and is responsible for regulating its temperature (OER #2). See Figure 2.1 of the hypothalamus.

The human body is constantly adapting to internal health states and environmental conditions, and the hypothalamus is programmed to tell the body to generate heat if the body temperature is low. For example, the hypothalamus can activate peripheral vasoconstriction and shivering (contraction of skeletal muscles) to prevent a decrease in body temperature. The hypothalamus can also reduce heat if the body temperature is too high. For example, it can activate peripheral vasodilation to increase heat loss and cause a person to perspire, which cools the body.

Position of the area of the hypothalamus in the brain in relation to the thalamus, mid-brain and pituitary gland

Figure 2.1: Hypothalamus (Illustration credit: Hilary Tang)

 

 

 

____________________________________________________

Part of this content was adapted from OER #2 (as noted in brackets above):

© Apr 10, 2017 OpenStax Anatomy and Physiology. Textbook content produced by OpenStax Anatomy and Physiology is licensed under a Creative Commons Attribution License 4.0 license. Download for free at http://cnx.org/contents/7c42370b-c3ad-48ac-9620-d15367b882c6@12

License

Icon for the Creative Commons Attribution 4.0 International License

Vital Sign Measurement Across the Lifespan – 2nd Canadian edition Copyright © 2018 by Ryerson University is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

Share This Book