Homeostasis

• What is homeostasis?

  It is the process of maintaining a stable internal environment.
• Why do cells in the body need certain conditions to function properly?

  Because they cannot be too hot, too cold, too acidic, or too alkaline.
• What does the body regulate to maintain homeostasis?

  The body regulates temperature, glucose levels, and other conditions.
• How do temperature and glucose levels behave in the body?

  They fluctuate but only within small bounds.
• How can we define homeostasis in terms of internal and external conditions?

  It is the regulation of conditions inside the body in response to changes in both internal and external conditions.
• How does the body maintain a stable internal environment when exposed to extreme external conditions?

  By regulating internal conditions to remain stable, such as maintaining a temperature of 37 degrees Celsius.
• What are the three main components of automatic control systems in the body?

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

  They detect changes such as a rise in temperature.
• What is the function of coordination centers in the body?

  They interpret changes detected by receptors and decide what needs to be done.
• What are effectors in the context of homeostasis?

  They are the components that carry out the change, such as muscles or glands.
• How do the nervous and endocrine systems communicate in homeostasis?

  The nervous system sends fast electrical impulses, while the endocrine system uses hormones.
• What is the difference between the speed of response in the nervous system and the endocrine system?

  The nervous system is faster and more precise, while the endocrine system is slower and longer-lasting.
• What is the mechanism called that regulates homeostasis?

  negative feedback (loop that sends signals) the neuroendercrine system
• How does negative feedback work in homeostasis?


  It decreases a level that gets too high and increases it if it gets too low.
• What happens when the temperature in a room is too cold?

  Receptors detect the low temperature, and the nervous system sends impulses to effectors like muscles to shiver.
• What is the role of shivering in response to cold temperatures?

  Shivering increases body temperature to return it to normal.
• What occurs if the body temperature rises too high after shivering?

  A different set of receptors detects the rise, sending signals to coordination centers to initiate sweating.
• What is the overall process of homeostasis described in the video?

  It is a loop where levels that get too low are brought back up, and levels that get too high are brought back down.
• What are the key components of homeostasis and their functions?

  • Receptors: Detect changes in the environment.
  • Coordination centers: Interpret changes and decide on actions.
  • Effectors: Carry out responses to restore balance.
• How do the nervous and endocrine systems differ in their roles in homeostasis?

  • Nervous system:
  • Sends fast electrical impulses.
  • Provides quick responses.
  • Endocrine system:
  • Uses hormones released into the bloodstream.
  • Provides slower, longer-lasting responses.
• What is the process of negative feedback in homeostasis?

  • Detects when levels are too high or too low.
  • Decreases levels if too high.
  • Increases levels if too low.
  • Maintains stability through a feedback loop.