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1With naration http://multimedia.mcb.harvard.edu/media.html Inner life of a cellWith naration
2Section 3-2 (pages 55-60) Cell Features Objectives:List the three parts of the cell theory. (pg. 55)Determine why cells must be relatively small. (pg 55)Compare the structure of prokaryotic cells with that of eukaryotic cells. (pg. 57)Describe the structure of cell membranes. (p. 59)
12substances do not need to travel as far to reach the center of a small cell
13What Features are Common of cells? Cell membraneCytoplasmCytoskeletonRibosomes
14What is the Cell Membrane (plasma membrane) Cell Membrane: is the outer boundary layer of the cell, made up of phospholipids. It regulates what enters and leaves a cell – including, gases, nutrients, and wastes.
15What are phospholipids A phospholipid is a lipid made up of a phosphate group and two fatty acids.It has a hydrophilic head (water loving) and a hydrophobic tail (water hating)
16What is the lipid bilayer In a cell membrane, the phospholipids are arranged in a double layer called a lipid bilayer.The nonpolar (water hating) tails make up the interior of the bilayer, and the polar (water loving) heads make up the outer layer.
17CytoplasmCytoplasm: The interior of the cell which houses many organelles and cellular structures.
18CytoskeletonA system of microscopic fibers (tubules), inside the cytoplasm, that many organelles are suspended from.
23What is a Prokaryote (Bacteria) Prokaryotes are the smallest and simplest cellsThey are singled celled organisms that lack a nucleus, cytoskeleton, and other internal compartments.
24What are the Characteristics of Prokaryotes (Bacteria) Bacterium’s enzymes and ribosomes are free to move around in the cytoplasm because they lack internal compartments.Bacteria have a cell wall providing structure and supportSome bacteria have a flagella, long threadlike structures that enable movement.
37What is the Form and Function of the Mitochondria? Form: A kidney shaped organelle floating around in the cytoplasm, with a set of internal folding membranes.Function: It converts the energy stored in food compounds into a useful form, called ATP (adenosine triphosphate)
47What is the Form and Function of the Golgi Apparatus? Form: Flat pancake like sacsFunction: It’s the post office the cell. It makes vesicles, such as lysosomes; that store, sort, changes, packages, and distributes proteins throughout the cell.
52What is the Form and Function of Lysosomes? Form: Made by the Golgi Apparatus. Small spheres floating around the cytoplasm that contain digestive enzymesFunction: Lysosomes break down bacteria viruses, and non functional organelles within the cell.Often nicknamed “suicide bags”