Homeostasis Flashcards
What is homeostasis?
Homeostasis is the process whereby the body’s internal environment is maintained in a steady state.
What are 5 processes the body regulates?
- Core body temperature.
- pH and concentrations of solutes dissolved in the blood.
- Concentration of glucose.
- Blood pressure.
- Concentration of metabolic wastes.
What are the six stages of the steady state control system?
- Stimulus
- Receptor
- Modulator
- Effector
- Response
- Feedback
Describe the stimulus stage of the steady state control system.
Is a change in the internal or external environment.
Describe the receptor stage of the steady state control system.
Is a cell or nerve ending that detects the change.
Describe the modulator stage of the steady-state control system.
Receives the “message” and coordinates the response.
Describe the response stage of the steady state system.
Is the course of action. Is the change in response due to a stimulus.
Describe the feedback stage of the steady-state system.
Is how the stimulus changes.
What are the types of feedback loops?
- Negative feedback loops
- Positive feedback loops
Describe a negative feedback system.
The feedback is the opposite of the initial stimulus.
Describe a positive feedback system.
The feedback increases the initial stimulus.
What feedback system is more common in the body?
Negative feedback systems.
What are 3 examples of positive feedback systems?
- Childbirth
- Fevers
- Blood clotting
What is the body’s optimum temperature?
36.8 degrees