MICRO 20 Lecture Notes - Lecture 6: Extracellular Fluid, Cell Membrane, Cell Signaling
Document Summary
All living things are made up of cells and all cells come from pre- existing cells (mitosis). Producer of 10 trillion cells from one cell. 1 parent cell divides to produce two identical daughter cells. Cells change in structure and function due to signals from the environment after cell division. Stem cells still divided by mitosis but have changed to become a specific cell type. Lipid barrier between intracellular fluid and extracellular fluid. Cytoplasm all intracellular fluid inside organelles and between organelles. Most of the fluid in the body 67% Wall separating the interstitial fluid and the blood plasma. Largest organelle that holds nucleolus and surrounded by the nuclear envelope. Double membrane with a thin space between the membranes with nuclear pores. Selective holes in the nuclear envelope formed by membrane proteins. Dark spot in nucleus that produces rrna to help produce ribosomes. Proteins with dna strands wound tightly around them.
