The elements of the Eucharist, sacramental bread (leavened or unleavened) and sacramental wine (or by some grape juice), are consecrated on an altar (or a communion table) and consumed thereafter. Communicants, those who consume the elements, may speak of “receiving the Eucharist” as well as “celebrating the Eucharist”. Christians generally recognize a special presence of Christ in this rite, though they differ about exactly how, where, and when Christ is present. While all agree that there is no perceptible change in the appearances of the elements (smell, taste, color, weight, fragility, nutritional effects, etc. ), Roman Catholics believe that their substances actually become the body and blood of Christ (transubstantiation) while the appearances or “species” of the elements remain. Lutherans believe the true body and blood of Christ are really present “in, with, and under” the forms of the bread and wine (sacramental union). Reformed Christians believe in a real spiritual presence of Christ in the Eucharist. Anglican eucharistic theologies universally affirm the real presence of Christ in the Eucharist, though Evangelical Anglicans believe that this is a spiritual presence, while those of an Anglo-Catholic churchmanship believe this is a corporeal presence. Others, such as the Plymouth Brethren, take the act to be only a symbolic reenactment of the Last Supper and a memorial.