BIOL 1412 Lecture Notes - Lecture 3: Glycolipid, Microvillus, Hydrophile

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1412
• Professor: Ibrahima Diallo

Document Summary

Basic structural and functional unit of the body. Can perform all basic life functions: principal parts of the cell, cell membrane / plasma membrane / plasmalemma. Phospholipid bilayer i. ii. iii. phosphate head group (hydrophilic) Membrane proteins scattered throughout membrane adds stability to the cell membrane. Within the membrane have a hydrophobic region some extend across entire membrane = transmembrane: peripheral proteins attached to either surface of integral proteins. Membrane proteins - functions: enzymes transporters channels receptors anchors identity markers (for immune system) d) Membrane carbohydrates only on outer surface bound to proteins (glycoproteins) or lipids (glycolipids) Functions: i. ii. cell recognition (e. g. egg and sperm) anchor cells together e) Best seen on cells of the small intestine and kidney. A) and c) = fluid mosaic model of the cell membrane: fluid - membrane constituents can move around (phospholipids and some proteins) mosaic proteins dot surface like tiles in a mosaic: cytoplasm.