Types of neuroendocrine tumors. Various types of neuroendocrine tumors can occur in many places in the body and grow differently. Many NETs first appear in the lungs or the gastrointestinal tract, including the stomach, pancreas, appendix, intestines, colon and rectum. NETs may also appear in the thymus, thyroid gland, adrenal gland and pituitary gland.
Ricin is a type of biological toxin that is predominantly derived from the bean of the castor plant. Log in to see link for more information. Ricin is a type of biological toxin that is predominantly derived from the bean of the castor plant. Log in to see link for more information.
Types of Motives. There are two popular types of motives: â¢ Primary or biological â¢ Secondary or psychosocial. PRIMARY MOTIVE. Primary motives also known as biological motives, have a definite physiological basis and are biologically necessary for survival of the individual or species. These arouse the behavior of the organism in directions that lead to the required change in internal environment.