HTHSCI 1H06 Lecture Notes - Lecture 3: Golgi Apparatus, Cell Membrane, Integument
16 Apr 2019
School
Department
Course
Professor
Document Summary
Obtain nutrients and form chemical building blocks (harvest energy for survival) Disposes of waste (avoid accumulation disrupting cellular activities) Cell division (make more of the same cell and maintain tissue by providing new cells) Plasma membrane: forms the cell"s flexible outer surface, separating the cells internal environment from the external environment. Selective barrier that regulates the flow of materials into and out of a cell. Selectivity helps establish and maintain the appropriate environment for normal cellular activities. Plays a key role in communication among cells and between cells and their external environment. Cilia, flagellum, microvilli (modified extensions of the plasma membrane) > cilia: short hair-like projections that extend from the plasma membrane. Flagellum: are similar to cilia but much longer, usually move an entire cell. > microvilli: smaller than cilia, lack powered movements, form extensive plasma membrane surface. Cytoplasm: consists of all the cellular contents between the plasma membrane and the nucleus.
