PNB 2264 Lecture Notes - Lecture 2: Endocytosis, Paracellular Transport, Heredity

• School: UConn
• Department: Physiology and Neurobiology
• Course: PNB 2264
• Professor: crivello

Document Summary

Basic structural and functional unit of the human body: capable of rebuilding the human body from a single cell. Cells: maintain homeostasis (intracellular and extracellular, grow (mitosis and meiosis) and differentiate, produce proteins and macromolecules, communicate with other cells, produce and use energy, produce tissues and organs. Cells: four basic types in humans, with 200 variations, all cells share a plasma membrane (outer wall) and cytosol (fluid, cells differ. Normal cell functions: movement and support (internal and external, production of energy (glucose, free fatty acids and atp) and use of energy, growth. Roughly 10^14 cells with 10^15 symbiotic microbes. So why are we so many cells: not all cells have to do the same thing, cells express a different number of genes, cells are farther away from the outside of the body. Costs: special types of cell to cell contact, systems to control how cells function.