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the process whereby nutrients that have been absorbed from the digestive system are taken up by the cells and become part of the cells cytoplasm.
special chemical molecules that transmit nerve impulses across a synapse.
the movement of molecules across a membrane against the concentration gradient, from an area of...
structure surrounding plan tcells i tgives cells rigidity and strength.
blood that has no antibodies (blood group AB) and can receive any type of blood.