Negative feedback mechanisms

• How does negative feedback function like a thermostat?

  It detects changes and triggers corrective processes
• What is the role of negative feedback in the body?

  • Maintains homeostasis
  • Corrects deviations from normal ranges
  • Initiates processes like sweating or shivering
• How does the nervous system regulate homeostasis according to the diagram?

  • Skin thermoreceptors detect changes in body temperature
  • This information is sent to the thermoregulatory centre in the hypothalamus
  • The hypothalamus then sends signals to effectors like blood vessels and sweat glands to maintain temperature
• What does homeostasis regulate in the body?

  Body temperature and blood sugar levels
• What occurs once conditions return to normal in the negative feedback loop?

  The corrective mechanisms switch off
• In a negative feedback loop, what happens after a change is detected?

  Corrective mechanisms are activated
• How do the three homeostatic systems shown in the diagram work together to maintain the body's internal environment?

  The nervous system detects changes, the endocrine system releases hormones, and the negative feedback loop coordinates the response to restore balance
• What does the control centre do in a negative feedback loop?

  It processes the information received
• What is the definition of homeostasis?

  Process of maintaining internal stability
• What happens when body temperature strays too high?

  Negative feedback initiates sweating
• According to the diagram, what leads to corrective mechanisms being switched off?

  Conditions returned to set point
• Why do we shiver when cold?

  To generate heat and maintain temperature
• What are the steps in a negative feedback loop, as illustrated in the image?

  • Conditions in the body change from set point
  • Change detected
  • Corrective mechanisms activated
  • Conditions returned to set point
  • Corrective mechanisms switched off
• How does homeostasis relate to external environmental changes?

  It maintains stability despite external changes
• How does homeostasis function in the body?

  It keeps internal environment stable despite changes
• What is the definition of negative feedback?

  A process that maintains homeostasis
• What happens to blood glucose levels after eating?

  They rise and then return to normal
• What is the overall purpose of negative feedback processes in the body?

  • To maintain stability
  • To ensure health
  • To regulate internal conditions
• What are the steps involved in a negative feedback loop?

  1. A stimulus disrupts homeostasis
  2. Receptors detect the change
  3. Control centre processes the information
  4. Effectors carry out corrective actions
  5. Response reduces the original stimulus
• What are the three main systems involved in homeostasis according to the diagram?

  • Negative Feedback
  • Nervous System
  • Endocrine System
• What are the two main components of the Negative Feedback Mechanism?

  • Warming and Increased Weathering
  • Cooling and Decreased Weathering
• If a person's body temperature rises, what would the hypothalamus do to restore homeostasis?

  Increase blood flow to the skin and activate sweat glands
• How does negative feedback regulate body temperature?

  By initiating corrective mechanisms when needed
• What is the ideal condition that negative feedback aims to maintain?

  The set point
• How does negative feedback help maintain homeostasis?

  It corrects deviations from normal ranges
• What physiological response occurs when the body gets cold?

  Shivering to generate heat
• How do the Positive and Negative Feedback Mechanisms interact to influence the Earth's climate?

  The Positive Feedback Mechanism amplifies climate changes, while the Negative Feedback Mechanism dampens them, leading to a complex interplay that determines the overall climate trends.
• How do receptors function in a negative feedback loop?

  They detect changes in the environment
• What is the function of effectors in a negative feedback loop?

  They carry out corrective actions
• What is the name of the mechanism shown in the image?

  Positive Feedback Mechanism
• What is the role of the endocrine system in homeostasis according to the diagram?

  • The endocrine system releases hormones like ADH to regulate water levels in the blood
  • The hypothalamus controls the release of these hormones to maintain water homeostasis
• What is the fundamental difference between negative feedback and positive feedback?

  Negative feedback moves conditions toward a set point
• How does the Positive Feedback Mechanism work?

  Cooling leads to ice growth, which increases albedo, leading to less insolation absorbed and further cooling. Warming leads to ice melting, which decreases albedo, leading to more insolation absorbed and further warming.
• What are the four essential components of a negative feedback loop?

  Stimulus, receptors, control centre, effectors
• What are the key features of negative feedback and positive feedback?

  • Negative Feedback:
  • Goal: Maintain stability
  • Loop Type: Correction
  • Direction: Toward set point
  • Positive Feedback:
  • Goal: Amplify change
  • Loop Type: Reinforcement
  • Direction: Away from set point
• How do kidneys contribute to water balance in the body?

  They adjust water reabsorption into blood
• What physiological response occurs when the body gets hot?

  Sweat glands produce sweat
• In what direction does positive feedback move conditions?

  Away from set point
• What is the role of negative feedback in homeostasis?

  It helps maintain balance in the body
• What type of loop is associated with negative feedback?

  Correction