Natural killer cells, or NK cells, are a component of the innate immune system which does not directly attack invading microbes. Rather, NK cells destroy compromised host cells, such as tumor cells or virus-infected cells, recognizing such cells by a condition known as missing self..
Definition. Market Value is generally defined as: âThe most probable price which a property should bring in a competitive and open market under all conditions requisite to a fair sale, the buyer and seller, each acting prudently, knowledgeably and assuming the price is not affected by undue stimulus.
â¢ Stimulus is the first event that takes place, and the response is the result. â¢ A stimulus could be of any magnitude, but the response could never go beyond the highest capability of an organism. â¢ Stimulus cannot be always controlled, especially the external stimuli, whereas response could be controlled.