Answer:
This is an unanticipated problem, which resulted in an adverse event.
Explanation:
It is important that a study drug be thoroughly evaluated before being applied to a patient, because an error can cause very harmful reactions. However, sometimes errors go unnoticed, even if the study coordinator is cautious and tries not to make any mistakes as it may harm the patient, as happened in the case shown in the question. These errors that go unnoticed refer to a situation where an unforeseen problem has resulted in an adverse event.
The parts of the brain has blood cells
I agree with the other person - emotion is the part of consciousness that involves feeling or sensibility.
Feelings and emotions are the same thing - those two words are synonyms, which means their meaning is identical. So when you feel something, that particular something is called emotion or feeling, and is related to sensibility.