![]() ![]() ![]() The principal components identified at that time were lipids and proteins. ![]() Oncogenes develop abnormal function-> dedifferentiation Cancer 4.The existence of the plasma membrane was identified in the 1890s, and its chemical components were identified in 1915. Carcinogens damage & change normal proto oncogene to oncogene 3. Transformation from normal to abnormal cell 2. Atrophy- loss of stimulation, organ shrinks & eventually loses function Cancer 1. Hyperplasia- acceleration of cell growth for repair 2. ![]() Differentiation leads to changes in function & structure Local Changes 1. O2 & CO2 differences between deep & superficial cells trigger changes in gene expression 3. General-> specific, single cell-> all body cells 2. Amoeba sp, monocytes, & neutrophils Developmental Aspects of Cells 1. Vesicle formation & movement into the cell 4. Formation of cytoplasmic extensions, pseudopodia 2. Vesicle formation & movement of material into the cell Phagocytosis 1. Active transport, exocytosis, endocytosis Endocytosis 1. Movement of molecules into cell against a gradient 2. Usually water-soluble molecules Energy Negative 1. Diffusion assisted by transport proteins 2. Crenation- the shrinking of cells in a hypertonic solution, especially RBCs Facilitated diffusion 1. Plasmolysis- plant cell’s plasma membrane pulling away from its cell wall as the central vacuole loses H2O 2. Hypertonic Isotonic Hypotonic Hypertonic 1. Ions across cell membrane through channel proteins Tonicity 1. Dissolved gases (O2 & CO2) & lipid soluble molecules across cell membrane 3. Net random movement of a substance from areas of greater concentration to areas of lesser concentration 2. Diffusion, osmosis, & facilitated diffusion Diffusion 1. Movement with a concentration, electrical, or pressure gradient 2. Energy neutral & energy negative Energy Neutral 1. Movement of materials in & out of the cell 2. Embedded proteins shift through the bilayer Phospholipid BilayerĬell Transport 1. Plasma membrane is a phospholipid bilayer with embedded proteins, cholesterol, glycolipids, & glycoproteins 3. Download Fluid Mosaic Model - Lecture Slides | BIO 1040 and more Biology Study notes in PDF only on Docsity!Fluid Mosaic Model 1. ![]()
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