The interaction of calcium and vitamin D. Refer to the previous exercise. It is expected that the effect of vitamin D on TBBMC will be greatest when there is an adequate intake of calcium. In other words, the effect of vitamin D is expected to be greater with the higher doses of calcium. It is also expected that the men in the study will generally have adequate calcium and vitamin D in their diets, so the effect of the supplements will be very small at best. Draw pictures that illustrate these expected interactions.