Perceiving pain and assisting in regulating muscle reflexes, breathing, and arousal are all functions of the a. cerebral cortex b. medulla c. reticular formation d. pons

The correct answer is option C,reticular formation

Explanation:

The reticular formation is made of interconnected nuclei that intrude into different segments of brain and the nervous system and thus they are responsible for several functions.  

For example –  

The ascending reticular formation is in touch base with the thalamus and thus it is responsible for sleep related reflexes such as walking in sleep etc. like wise the descending segment of the reticular formation is in touch base with the hypothalamus and thus is related to posture related reflexes and autonomic nervous system activities. The descending reticular control reflexive behavior such as vomiting coughing, swallowing, arousal, breathing etc.  

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

it has to be b, about 97 percent.