16.1 - Homeostasis Flashcards
The role of receptors and effectors in maintaining homeostasis What negative feedback systems are What positive feedback systems are
What is homeostasis?
Maintenance of stable internal environment
Why is homeostasis important?
3 reasons
- It keeps the internal environment constant for metabolic reactions.
- It ensures cells function properly and avoid damage.
- It helps organisms respond and adapt to external changes.
What are the control mechanisms in homeostasis?
Receptors
What is the role of receptors?
Detect stimuli
What is the role of coordinators?
Receive and interpret information
What is the role of effectors?
Cause responses to reverse changes
What is a negative feedback system?
Reverses changes to maintain optimum
How does negative feedback work?
Receptors detect change
What are examples of negative feedback mechanisms?
Blood glucose
What is the importance of maintaining blood glucose?
Glucose for respiration
What is the importance of maintaining blood pH?
pH affects enzyme action
What is the importance of maintaining temperature?
Temperature affects enzyme action
What is the importance of water regulation?
Too much or too little water causes cell damage
What is a positive feedback system?
Amplifies changes
How does positive feedback work?
Initial change
What are examples of positive feedback mechanisms?
Blood clotting
