What was the role of the water test tube in each phase? why do we often use water for this role?

A water bath is laboratory equipment made from a container filled with heated water. It is used ... Markers tend to come off easily in water baths. Use water resistant ones. If application involves liquids that give off fumes, it is recommended to operate water

answer; hypnagogic sensations)

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .