Cells Review (Chapter 3)

What are the 3 components of cell theory? Cells come from cells Cells are the basic unit of life All living things are composed of cells

What are some differences between prokaryotic and eukaryotic cells? Pro means no! No nucleus, no membrane bound organelles All single celled Ex: bacteria Eu is like you! Larger and more complex than prokaryotic Nucleus and other membrane bound organelles Multicellular or single celled Ex: animals, plants

Cell Organelles. Describe the function Cytoskeleton Nucleus Endoplasmic reticulum Ribosome Golgi apparatus vesicle Mitochondria Vacuole Lysosome Centriole Cell wall chloroplast

Which organelles are only found in plants? Chloroplast Cell wall Large central vacuole

Cell Membrane What is it composed of? Phospholipid bilayer Describe the structure of a phospholipid Head: polar, glycerol and phosphate group, hydrophilic Tail: non polar, two fatty acid chains, hydrophobic Why is the cell membrane described as selectively permeable? Certain things can go in and out What is the fluid mosaic model? Flexible membrane composed of many pieces

Types of Passive Transport Diffusion Osmosis Facilitated diffusion What is passive transport?

Types of Active Transport Endocytosis phagocytosis Exocytosis What is active transport?

Solutions Hypertonic Hypotonic Isotonic What would happen to a cell placed in a hypertonic solution? Hypotonic What would happen to a cell placed in a hypotonic solution Isotonic