Answer:
Here, took me some time ;)
Explanation:
The sympathetic nervous system releases two hormones within the body in response to stress, resulting in an adrenaline rush or a sense of urgency that occurs during stressful conditions. These hormones are called epinephrine. So it releases hormones to give you adrenaline in a bad situation or stressful one
Multicellular organisms use different types of cells to function not just one cell. If cells grew larger that cell would be more demanding.