homeostasis

• What is homeostasis?

  Maintaining a stable internal environment despite changing conditions
• Why do cells need specific conditions to function?

  To operate properly without stress
• What conditions must be regulated for cells?

  Temperature, acidity, glucose, and water
• Do our body levels remain exactly constant?

  No, they fluctuate sometimes
• How can we define homeostasis?

  Regulation of internal conditions for stability
• How does the body maintain internal conditions despite external changes?

  By using automatic control systems
• What are the three main components of automatic control systems?

  Receptors, coordination centers, and effectors
• What role do receptors play in homeostasis?

  They detect changes in conditions
• What are coordination centers in the body?

  Brain and spinal cord interpreting changes
• What do effectors do in the control system?

  Carry out changes to restore balance
• How do the nervous and endocrine systems communicate?

  Nervous system uses electrical impulses; endocrine uses hormones
• What is the speed of response for the nervous system?

  Fast and precise
• How do hormones function in the endocrine system?

  They affect specific cells with receptors
• What is the nature of the endocrine system's response?

  Slower, longer-lasting, and more generalized
• What is the mechanism called that regulates homeostasis?

  Negative feedback
• How does negative feedback work?

  It reverses changes to return to normal
• What happens when glucose levels rise too high?

  Negative feedback decreases glucose levels
• What occurs if body temperature drops too low?

  Receptors detect it and send signals
• What is the role of shivering in temperature regulation?

  It increases body temperature when cold
• What happens if body temperature rises too high?

  Different receptors detect and signal for sweating
• How does the feedback loop function in homeostasis?

  It adjusts levels back to normal through feedback
• What are the key components of homeostasis in the body?

  • Receptors: Detect changes
  • Coordination centers: Interpret changes
  • Effectors: Carry out responses
• What is the process of negative feedback in homeostasis?

  1. Detect change (too high or too low)
  2. Send signals to coordination centers
  3. Effectors carry out responses
  4. Levels return to normal
• How does the body respond to cold temperatures?

  • Receptors detect low temperature
  • Nervous system sends signals
  • Effectors (muscles) cause shivering
  • Body temperature increases
• What are the two types of effectors?

  Muscles that contract when stimulated and glands that release hormones