Anatomy And Physiology I BIOL 2113 Lecture Notes - 3A.docx...

This preview shows page 1 - 3 out of 7 pages.

Anatomy And Physiology I BIOL 2113CellsI. Cell Structure and FunctionA. Cell Theory1. A cell is the basic structural and functional unit of living organisms2. All cells come from pre-existing cells3. The activity of an organism depends on both the individual and the collectiveactivities of its cellsA) Principle of Complementarity – the biochemical activities of cells are dictatedby their specific subcellular structures4. Most cells are capable of self-reproductionB. Typical cells are made of three main parts:1. Cell (plasma) membrane2. Nucleus3. Cytoplasm and cytoplasmic organellesC. Cell Membrane1. A flexible, selectively permeable membrane that defines the extent of a cell byseparating intracellular fluid (ICF) from the extracellular fluid (ECF)2. The Fluid Mosaic Model – 1972A) Composed of a phospholipid bilayer1) Hydrophilic heads face outward1
Anatomy And Physiology I BIOL 21132) Hydrophobic tails face inwarda) creates a hydrophobic corethat gives the membrane selectivepermeability3) Two layers are moveable (fluid)B) The plasma membrane contains many embedded structures1) Proteins:a) Transmembrane proteins – proteins that typically extend all the wayacross the membrane and play a role in many functionsi) Transport proteins(a) Channels, pores, carriers, and pumpsii) Enzymesiii) Receptorsiv) Intercellular junctionsv) Cell-cell recognitionb) Surface (peripheral) proteins – proteins that are attached to either side ofthe membrane and are mostly involved with:i) Acting as enzymes & receptors

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 7 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Summer
Professor
NoProfessor
Tags
ICF, ECF, c Cell Membrane

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture