Stress increases the activity of the central nervous system. A positive effect of this is that it makes a person more alert and focused. A negative effect is that it

No matter what they say you can’t change who you are so when u tell them whatever they say jus be like i’m who i am and i won’t change

Target heart rate is the answer

Unlike  ct scans, which use x-rays,  mri scans  use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures.  differences between  normal and abnormal tissue is often clearer on an  mri  image than a  ct.you can see more with a mri scan. for example on an mri you can see internal bleeding.