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.
Teacher professional development and classroom resources across the curriculum. Key Terms for Program 7: Sensation and Perception. Distal Stimulus: A distant stimulus, as opposed to the proximal, or near, stimulus. An object, such as a tree, which reflects light waves, is a distal stimulus with respect to the eye.