Human Systems Homeostasis How does this ice climber

Human Systems & Homeostasis

How does this ice climber hang on to his body temperature?

What is homeostasis? Ability of an organism to maintain its internal environment (within set ranges), despite changes to its internal or external environment

What things in your body need to be kept within a set range? Body Temperature Blood Pressure Blood p. H O 2 and CO 2 Concentration Osmoregulation-Water Balance Blood Glucose

How does homeostasis work? Specific organs and structures must communicate with each other in response to changes in the body http: //en. wikipedia. org/wiki/File: Southern_12_stage-02_1988. jpg

Negative feedback loops are necessary for homeostasis. Feedback compares current conditions to set ranges. Negative feedback counteracts change. Negative Feedback Loop Holding breath, CO 2 levels rise, O 2 / CO 2 level returns to normal Control system forces exhale, inhale

Explain this negative feedback loop

Turn to a Partner: Explain this Feedback Loop Glucose levels rise after a meal. Insulin is produced and glucose levels fall to normal again. Glucose Concentration Normal Time Meal eaten

Positive feedback increases change – Example: Torn blood vessel stimulates release of clotting factors platelets blood vessel fibrin clot white blood cell red blood cell