Week 3: Homework notes
Week 3: Homework notes BIOL0004-A
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This 2 page Class Notes was uploaded by Alexis Bussiere on Tuesday February 2, 2016. The Class Notes belongs to BIOL0004-A at University of Vermont taught by John J Mitchell in Spring 2016. Since its upload, it has received 22 views. For similar materials see the human body in Biological Sciences at University of Vermont.
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Date Created: 02/02/16
Chapter 3 pgs 50 -57 Tuesday, February 2, 8:45 AM Glycolipids- lipids with sugar attachments Integral proteins-proteins firmly embedded in the bilayer Membrane protein functions: ○ Transporting ○ Binding substances across the membrane ○ Catalyzing chemical reactions (enzymes) ○ Enabling cell to be recognized by immune cells Plasma membrane functions: 1. Acting as a barrier that separates inside of a cell from its surroundings 2. Transport proteins--water-soluble material -- and the bilayer itsel-f-lipid- soluble material 3. Identifying the cell to immune cells 4. Intercellular signaling Selective permeability- controlling the flow of material into and out of the cell via a property Cytoskeleton- made up of the following protein elements: • Microfilaments - small protein strands that provide mechanical support & generate force for movement • Intermediate filaments - protein strands that hold organelles in place and attach cells to one another • Microtubules - long, hollow protein tubes that determine shape & movement --similar to how our bones shape our --they stiff components of cilia & flagella Centrosomes- play a role in cell division Cilia- short, hair like projections of the plasma membrane that sweep material across the surface of the clcells consists of 100s of these Flagella- moves the entire cell Lysosomes- membrane -enclosed vesicles that contain digestive enzyme -it breaks down material ingested by the cell from the extracellular environm-nt proteins, bacteria Flagella- moves the entire cell Lysosomes- membrane -enclosed vesicles that contain digestive enzyme -it breaks down material ingested by the cell from the extracellular environm-nt proteins, bacteria Peroxisome- contains enzymes called oxidases that removed hydrogen atoms from various molecules such as;; amino acids & fatty acids Catalase- breaks down hydrogen peroxide into water and oxygen Proteasomes- break down faulty, damaged, and unneeded proteins into smaller peptides Nuclear pores- control the movement of substances into an out of the nucleus
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