The amount of detail microscopes allow us to see varies from one type instrument to another. 42
3.2 Cellular Organization
A cell is highly organized and contains organelles that carry out specific functions. 44The plasma membrane regulates the entrance and exit of molecules and ions into and out of the cell. 46The nucleus, a centrally located organelle, controls the metabolic functioning and structural characteristics of the cell. 49A system of membranous canals and vesicles works to produce, store, modify, transport, and digest macromolecules. 50Mitochondria are organelles concerned with the conversion of glucose energy into ATP molecules. 52The cell has a cytoskeleton composed of microtubules and filaments; the cytoskeleton gives the cell a shape and allows it and its organelles to move. 53
3.3 Cellular Metabolism
The cytoplasm contains metabolic pathways, each a series of reactions controlled by _enzymes. 54