The answer is perception:
Perception is what gives the meaning to our senses
While velocity is your speed, or how fast you are moving, acceleration refers to how your velocity is changing. For example, a negative acceleration means you are slowing down
Hope this helps
The patient should be given an explanation that torsion of the testes is an emergency situation. The torsion causing blood vessel flow stopped, therefore causing the testes to not getting any oxygen or food. Not getting oxygen is like holding your breath. If left as it is, the testes cells will start to die.
Faster treatment can prevent the cells from dying.