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Chapter 3 The cellular Level of Organization Pages 64 78 1. Parts of a Cell: Fig.3.1 -100 trillion cells in be -Smallest living unit cell -Smallest non-living unit atom -200 stress types of cells A. Plasma Membrane -Phospholipid bi spirit level B. cytol -Region bound by plasma tissue layer -Excludes nucleus C. inwardness -Nuclear envelope -nucleolus -Ribosome assembly -Chromatin -Protein packages deoxyribonucleic acid into chromosomes 2. The Plasma Membrane: Fig. 3.2 -Fluid arial mosaic model -Not unshakable -Consistency of olive oil A. The Lipid Bi shape -Imbedded proteins and cholesterin i. Phospholipids -Bilayer ii. Cholesterol -Determine permeability -Determine rigidity -More cholesterol more rigid iii. iv. Glycolipids -Sugar group attached directly to lipids -Only on out of doors layer B. Arrangement of Membrane Protein s i. Integral Proteins -Difficult to re die hard from membrane -Most atomic number 18 trans membrane proteins ii. Transmembrane Proteins -Extend across both layers - convey -Receptors iii. Peripheral Proteins -On the surface proteins -Linked to lipids or underlying proteins -Easily removable iv.

Glycoproteins -Glucose chains attached to proteins -Most are trans membrane -2 to 60 monomers -Outside only v. Glycocalyx -Glycoproteins form the glycocalyx -Slippery layer on the removed of the cell -Cell identification -Cell to cell attachment B. Functions of Memb rane Proteins: Fig. 3.3 i. Ion Cha! nnels -Integral protein -Na+, K+ -Large persona in muscle contraction and kernel impulses -Most are ad hoc to one ion ii. Carriers -Some are transport proteins -Allow substances to move in iii. Receptors -Recognize a particularized ligand -Alters cell function in some way -Viruses get into cells by binding to receptors iv. Enzymes -Can be integral or...If you want to get a full essay, score it on our website: BestEssayCheap.com

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