Explain the difference between essential and trace elements {Ans: Essential are required for human life. Trace are required, but in small amounts}What is an ionic bond {Ans: Generated based on the attraction of oppositely charged particles}Which type of cell junctions are mechanical structures that wrap around the cell to prevent extracellular fluid from leaking? {Ans: tight junctions}Why is the electrochemical gradient important for cellular function? {Ans: It allows for complex voltage gating to occur for example the release of insulin}What 3 types of protein fibers make up the cytoskeleton? {Ans: microfilaments, microtubules, and intermediate filaments}Which of the following are not one of the organic compounds that make up biomacromolecules? Lipids, proteins, ribosomes, carbohydrates {Ans: ribosomes}