Malcolm is studying alone in his room late at night when he hears a loud noise downstairs. his heartbeat increases significantly and his breathing becomes shallow. he wonders if a burglar has entered the house and decides to investigate. which division of his nervous system was activated?

Sympathetic nervous system

Explanation:

The sympathetic nervous system stimulates the fight-or-flight system which induces secretion of epinephrine and norepinephrine. This lead to an increase in heartbeat and shallow breathing.

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.