Comparison definition. The distinction between the admissibility of an expert's opinion testimony and the submissibility of a plaintiff's case in reliance thereon was discussed in Callahan v. Cardinal Glennon Hosp., 863 S.W.2d 852, 860  (Mo. banc 1993). If a question exists as to whether the proffered opinion testimony of an expert is supported by a sufficient factual or scientific foundation, the question is one of admissibility. It must be raised by a timely objection or motion to strike. Once opinion testimony has been admitted, as any other evidence, it may be relied upon for purposes of determining the submissibility of the case. See Goodman v. Allen Cab Company, 360 Mo. 1094, 232 S.W.2d 535, 539 (1950). The natural probative effect of this testimony is a consideration for the jury. DeMoulin v. Roetheli, 354 Mo. 425, 189 S.W.2d 562, 565 (1945).