6.4.1 Homeostasis

Question 1

Define Homeostasis

Answer 1

Maintenance of a constant internal enviroment

Question 2

Define negative feedback

Answer 2

• A change to the normal/optimal level that initiates a response
• Of corrective measures, which reduces the affect, acting against the change

Question 3

Define positive feedback

Answer 3

• A change to the normal/optimal level that intitates a response
• That leads to the production of more hormones to further deviate from normal/optimal levels

Question 4

Explain why temperature control in homeostasis is important

Answer 4

• Body temperature is optimum temperature for enzymes
• High heat denatures enzymes, by altering their tertiary structure, and shape of active site
• Low heat reduces kinetic energy of molecules
• So fewer collisions
• So fewer enzyme-substrate complexs form
• Reaction slowed