Homeostasis


- A process by which organisms maintain a relatively stable internal environment (pg.1095 in textbook).

snow_robin_bird_1021050_l.jpg

^ This robin maintains an internal stability even though it is cold outside because it's feathers provide insulation and because it produces body heat (pg. 19 in textbook).



- When you shiver, your body produces heat (pg. 19 in textbook).
- When you get too hot, your body produces sweat to cool you off (pg. 19 in textbook).
- When you need more water, internal stimuli make you feel thirsty (pg. 19 in textbook).


THE INTEGUMENTARY SYSTEM - serves as a barrier against infection and injury, helps to regulate body temperature, removes waste products from the body, and provides protection against ultraviolet radiation from the sun. Consists of hair, skin, and nails (pg. 933-936 in textbook).



^ The Integumentary System ^ (available only at home computer)


  • A nonliving example of homeostasis would be the heating system of a house which would be controlled by feedback inhibition (pg. 895 in textbook).



The hypothalamus is a part of the brain that contains nerve cells that monitor both the temperature of the skin at the surface of the body and the temperature of organs in the body's core (pg. 896 in textbook).

hypothalamus.jpg