homeostasis

• homeostasis

  • homeo: same, stasis: sate
  • regulation and internal maintenance of the body
  • the body works best when internal conditions are within an acceptable range; homeostasis helps with this
• homeostasis

  • homeo: same, stasis: sate
  • regulation and internal maintenance of the body
  • the body works best when internal conditions are within an acceptable range; homeostasis helps with this
• feedback loops

  • homeostasis controls internal conditions writh feedback loops
  • negative product inhibits (slowdown) process that creates them
  • positive product amplifies (quickens) process that creates them
• feedback loops

  • homeostasis controls internal conditions writh feedback loops
  • negative product inhibits (slowdown) process that creates them
  • positive product amplifies (quickens) process that creates them
• homeostasis examples happening in the body

  1. thermoregulation (temperature)
  2. osmoregulation (water)
  3. gas exchange
  4. blood glucose
• homeostasis examples happening in the body

  1. thermoregulation (temperature)
  2. osmoregulation (water)
  3. gas exchange
  4. blood glucose
• variables

  1. volume
  2. temperature
  3. chemicals
• variables

  1. volume
  2. temperature
  3. chemicals
• variables

  • must maintain at a set point
  • when a change is detected, actions are triggered to bring the body back to a normal range
  • to keep the body at normal, it undergoes feedback loops
• variables

  • must maintain at a set point
  • when a change is detected, actions are triggered to bring the body back to a normal range
  • to keep the body at normal, it undergoes feedback loops
• feedback loops

  • contains a series of events that lead to an output
• feedback loops

  • contains a series of events that lead to an output
• negative feedback loops

  • oppose initial change and resist change to bring body closer to a normal state
  • reduce output
  • receptor gives info to control center and monitors body internal condition
  • control center or brain integrates info given by receptors
  • effector are cells, organs, or other structures that receive signals from control center and changes function to correct change in variable
• negative feedback loops

  • oppose initial change and resist change to bring body closer to a normal state
  • reduce output
  • receptor gives info to control center and monitors body internal condition
  • control center or brain integrates info given by receptors
  • effector are cells, organs, or other structures that receive signals from control center and changes function to correct change in variable
• process of feedback loop

  1.   STIMULUS is a regulated variable and info that is outside of its normal range

  2. That info is picked up by a RECEPTOR OR SENSOR

  3. Receptor sends this info to CONTROL CENTER

  4.   CONTROL CENTER determines if variable is out of its normal range
• process of feedback loop

  5.   If it is out of normal range, CONTROL CENTER sends signals to EFFECTOR or cells or organs

  6.   EFFECTORS cause physiological response that return the variable back to its normal range

  7.   Variable returns to normal, stimulus is no longer present

  8.   CONTROL CENTER allows effector to return back to normal activity, until another change in variable is detected
• positive feedback loops

  • reinforce initial change in variable
  • increase output
  • result in more of a product
  • occurs when somethings needs to happen quickly
  • bring body farther away from normal variable
  • stopped by negative feedback s once the process that it was used for is complete
• positive feedback loops

  • reinforce initial change in variable
  • increase output
  • result in more of a product
  • occurs when somethings needs to happen quickly
  • bring body farther away from normal variable
  • stopped by negative feedback s once the process that it was used for is complete