In biological systems, there are several membrane transport systems responsible for the passage of ions like Na + and K + , or small molecules like glucose and amino acids, through biological membranes. Classify each membrane transport system as either a primary active transporter, a secondary active transporter, or a passive transporter. Primary active transporter Secondary active transporter Passive transporter Answer Bank Which transport systems utilize a chemical reaction for the energy source? the Ca 2 + ATPase of the sarcoplasmic reticulum the Na + / K + ATPase of plasma membranes the amino acid − Na + transporter of kidney cells the glucose transporter of erythrocytes the glucose − Na + transporter of intestinal epithelial cells]