Multiple choice Which of the following compounds does not represent an autacoid? Angiotensin Histamine Prostaglandin Somatomammotropin Serotonin Reveal answer Fill a bubble to check yourself D Correct answer Explanation Autocoids are a group of substances found naturally in our body that resemble hormones or drugs in their activity on cells, and thus act on restricted areas of our body. Somatomammotropin is a typical hormone and not an example of autocoid.