Usually if we are talking about needles and body fluids, They are usually put into a box that is labeled hazard! And they dispose of the materials in a special trash can! :) Hope this helps!
Chemicals (chemoreceptors)
Temperature (thermoreceptors)
Pressure (mechanoreceptors)
Light (photoreceptors)
Good luck
The one that isn’t given the treatment is the control because it allow you to compare the result of when you would add music and when there isnt music
