The muscles that do not require conscious control are called .

Yes, this is very true. specifically causing damage in the  dentrite. 

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.

Not sure if you have answer choices but people who are active tend to have increased blood circulation to the body : )