Homeostasis (AQA GCSE Biology): Flashcards
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12 cards from this deck
What is homeostasis?
What is homeostasis?
Keeps internal conditions steady and balanced
Causes of enzyme denaturation
Causes of enzyme denaturation
Temperature too hot or pH too high/low
3 things body controls via homeostasis
3 things body controls via homeostasis
Body temp (), blood glucose, water levels
Optimal body temperature
Optimal body temperature
2 types of control responses
2 types of control responses
Nervous (fast) and chemical/hormones (slower)
3 parts of all control systems
3 parts of all control systems
Receptors, coordination centres, effectors
Role of receptors in control
Role of receptors in control
Detect stimuli (changes in environment or body)
Role of coordination centres
Role of coordination centres
Receive info from receptors and decide what to do
Role of effectors
Role of effectors
Muscles or glands that make the changes needed
Definition of negative feedback
Definition of negative feedback
System acts to reverse changes, return to set point
Body's response to excess water
Body's response to excess water
Kidneys reabsorb less, produce watery urine
Body's response to low water
Body's response to low water
Kidneys reabsorb more, produce concentrated urine
