homeostasis practicals

• What's the required practical for homeostasis called?

  Reaction time

  
• What's a controlled variable?

  Something you keep the same every time
• What's an independent variable?

  The one you change
• What's a dependent variable?

  The one you measure
• What's the independent variable in reaction time practical?

  Type of stimulant or depressant

  Distraction (e.g music)
• Give a stimulant and a depressant example

  Alcohol

  caffeine
• Give 3 controlled variables examples

  Same person catching the ruler

  Using the same hand to catch the ruler

  Start at the same height on ruler each time
• Name a way to increase accuracy for reaction time practical

  Use a computer to take reaction time measurements
• Name a way to increase precision for this practical

  Take measurements in milliseconds
• Name a way to increase reliability for reaction time practical

  repeat 3x and calculate mean
• Drop ruler between finger and thumb without warning

  Measure distance fallen before caught

  Repeat 3x and calculate mean

  Introduce stimulant and wait 10 minutes

  Repeat steps