PSY 2220 Quiz: BMS110 Chapter 4 Study Guide
Document Summary
Cell wall- lies next to the plasma membrane to provide structural stability to the cell. Central vacuole- maintains cell pressure, consists of water and nutrients. Cell membrane, cytosol, nucleus, mitochondria, chloroplasts, ribosomes, lysosomes. Diffusion- substance moves toward the area of its lower concentration. Osmosis- diffusion of water across a semipermeable membrane. Active transport- takes energy; expend energy to transport molecules or ions across cell membrane. Endocytosis- extracellular molecules and particles are taken into the cell via vesicle formation. It provides shape and structural support for the cell; changes shape, forming and breaking down and reforming, gives cells a plasticity or fluidity that allows them to change shape or move organelles quickly. Small non-membrane bound structures composed of protein and ribosoma. Rna that function as protein factories; makers of the proteins. Fall 2013: explain the purpose of the rough vs. smooth er, golgi, lysosomes, and vesicles.
