homeostasis

• What is homeostasis?

  Maintenance of a stable internal environment
• Why is homeostasis important for the body?

  It keeps internal conditions stable for survival
• What are the components involved in homeostasis?

  Receptor, control center, effector
• What role does a receptor play in homeostasis?

  It detects changes in a variable
• What is the function of the control center in homeostasis?

  Interprets input from the receptor
• What does the effector do in the homeostatic process?

  Brings about changes to alter the stimulus
• How does the nervous system contribute to homeostasis?

  Controls rapid responses to changes
• What is the role of the endocrine system in homeostasis?

  Regulates activities requiring duration
• What is the normal blood pressure range?

  120/80 mmHg
• What is the normal body temperature?

  37°C
• What is a feedback loop in homeostasis?

  A process that regulates changes in the body
• What are the factors that are homeostatically regulated?

  • Concentration of nutrient molecules
  • Water, salt, and electrolytes
  • Waste products
  • O2: 100 mmHg and CO2: 40 mmHg
  • pH: 7.35 - 7.45
  • Blood volume: 4 - 6 L
  • Blood pressure: 120/80
  • Temperature: 37°C
• What are the two types of feedback systems in homeostasis?

  Negative feedback and positive feedback
• What is negative feedback in homeostasis?

  Original stimulus is reversed
• What is positive feedback in homeostasis?

  Original stimulus is intensified
• How does temperature regulation work in homeostasis?

  Body adjusts heat production and loss
• What happens when body temperature rises?

  Blood vessels dilate and heat is lost
• What happens when body temperature drops?

  Blood vessels constrict and shivering occurs
• How does positive feedback occur during childbirth?

  Stretch receptors signal the brain to release oxytocin
• What role do baroreceptors play in blood pressure regulation?

  They detect changes in blood pressure
• What happens when blood pressure increases?

  Blood vessels dilate and heart rate decreases
• What is the result of negative feedback in blood pressure regulation?

  Blood pressure returns to normal levels