1

Tetanic contractions and tremor are different phenomena. Tetanic contraction (or tetanus) refers to sustained contraction of a muscle subjected to high-frequency stimulation. With this high frequency, a new contraction begins before the previous one has ended. Thus the contractions get 'summed up'. You could see this interesting video for a demonstration. ...


1

Humans don't constantly produce antibodies for a pathogen when the pathogen has been gone for a while. They just store the 'recipe' for making the particular antibody in memory T cells. If the antigens that the virus contains mutate enough to not work for the antibodies an immune person has developed. Then the process starts over and the immune system will ...


1

Diarrhoea Diarrhea is loosely defined as passage of abnormally liquid or unformed stools at an increased frequency. For adults on a typical Western diet, stool weight >200 g/d can generally be considered diarrheal. Diarrhea may be further defined as acute if <2 weeks, persistent if 2–4 weeks, and chronic if >4 weeks in duration. ~Harrison's ...


Only top voted, non community-wiki answers of a minimum length are eligible