Homeostasis presentation

Geography, Biology, Human and Animal Biology, Weather and climate, Age 11-14, Age 14-16

This presentation explains the term homeostasis, introduces the four constants of water, temperature, carbon dioxide and sugar and uses thermoregulation as an example of homeostasis. 11 slides.


1Teachable.net 2008. Some rights reserved. http://teachable.net/res.asp?r=2043 Homeostasis2How would you feel in this climate?3How would you feel in this climate?4Body TemperatureNormal body temp is
37 C
We can measure this in various ways/places:
Why is this temperature important?
How do we keep it constant in the body?5HomeostasisHomeostasis is

keeping a constant internal environment
In order for our tissues and cells to function properly the internal conditions of the body must be kept constant 4 main conditions.
64 main constants are
Water
Carbon Dioxide
Body Temperature
SugarHomeostasis7Negative feedbackHOTCOLD8ThermoregulationKeeping the body at a constant temperature.
Human enzymes work best at 37 C.
The temperature of the body is monitored by a part of the brain called the hypothalamus.
The hypothalamus detects change and triggers protective measures to bring temperature back to normal9 SWEAT
HAIRS LIE FLAT
VASODILATION
If blood temperature gets too high it could lead to heat stroke and dehydration.When we feel hot 10SHIVER
HAIRS STAND UP
VASOCONSTRICTION
SWEAT LESS
If the body temperature becomes too low hypothermia can occur which is fatal.