Homeostasis

Question 1

Negative feedback systems -

Answer 1

• Primary mechanism
• Maintain a normal range rather than a fixed value
• E.g Temp control , PH , blood sugar

Question 2

Positive feedback systems-

Answer 2

• Not as common
• Typically found where potentially dangerous or stressful process must be complete
• E.g haemostasis , labour and delivery

Question 3

What is Auto-regulation ( Intrinsic) mechanism-

Answer 3

Cells , tissues and organs adjust automatically to enviromental changes

Question 4

What is Extrinsic Regulation -

Answer 4

• Nervous system - Fast , short lasting , crisis management
• Endocrine system- Longer to react and Longer lasting

Parasympathetic - slow down events -rest and digest
Sympathetic - spped up - Fight and flight