1.6a components of homeostatic systems

Question 1

what are the 3 components of homeostatic systems?

Answer 1

1. receptor
2. control center
3. effector

Question 2

receptor

Answer 2

detects changes in a variable

Question 3

(receptor) stimulus

Answer 3

e.g., change in temperature sensed by skin

Question 4

control center

Answer 4

interprets input from receptor and initiates changes through effector

• nervous system can provide a quicker response
  (e. g., regulation of blood pressure upon rising)
• endocrine response is more sustained
  (e. g., parathyroid hormone regulating calcium levels)

Question 5

effector

Answer 5

the structure that brings about changes to alter the stimulus

Question 6

homeostatic control mechanism:

stimulus
receptor
control center
effector

Answer 6

1. (stimulus)
   changes in a variable that is regulated (e.g., temperature, stretch in muscle)
2. (receptor)
   structure that detects the stimulus (e.g., sensory neurons in skin, stretch receptors in muscle)
3. receptor sends input information to the control center
4. (control center)
   integrates input and initiates change through effector (usually brain or endocrine gland)
5. control center sends output information to an effector
6. (effector)
   structure (e.g., muscle or gland) that brings about a change to the stimulus

homeostasis restored!