APAC

What is the importance of homeostasis

• Homeostasis: involves the body’s regulatory mechanism ensuring balance in response to internal and external stimuli - if these mechanisms are compromised it can result in ill health 

• Balance is controlled via control systems which contain receptors (sensors), co-ordination centres and effectors

• The body utilises negative and positive feedback loops to help get the body back into its homeostatic limits.

What are the different types

• Mineral homeostasis

• Blood pH homeostasis 

• Fluid balance (osmoregulation) 

• Blood gas homeostasis 

• Energy and metabolic homeostasis 

• Defensive homeostasis 

• Neural and chemical homeostasis 

Describe the internal and external environment regarding homeostasis

Internal	External
Is the water based medium in which body cells exist Various different systems within the body	Surrounds the body  Source of oxygen and nutrients

Describe the feedback mechanism

Receptor → Control Centre → Effector 

What are the requirement of homeostasis

Requirements of Homeostasis

• Oxygen

• Water + nutrients 

• Stable body temperature 

• pH

What is the negative feedback loop?

• Decreases the initial stimuli to original set point