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Cell Organelles

TermDefinition
Cell (Plasma) Membrane Structure • Surrounds the outside of ALL cells! • Made of two layers (known as the phospholipid bilayer) Job • Controls what goes in and out of the cell • Critical for communication and maintaining a stable internal environment (homeostasis)
Cell (Plasma) Membrane: Phospholipid Bilayer • 2 layers of fats – Fats = phospholipids • Have hydrophilic (likes water) heads and hydrophobic (dislikes water) tails
Cell (Plasma) Membrane: Phospholipid Bilayer • Proteins embedded for transport • Carbs embedded for structure • Called “Fluid Mosaic Model” because it is composed of many parts that move around freely
Cytoskeleton Structure • Threadlike fibers • Made of proteins • Usually not pictured in a cell diagram Job • Give the cell shape • Can also move organelles around • Provide structural support for animal cells (who don’t have a cell wall)
Cytoplasm Structure • Jelly-like substance • Mainly made up of water Job • Holds everything in place • Provides a solution for chemical reactions to take place in
Nucleus Structure • Contains genetic material (DNA) – When DNA appears spread out = chromatin – When DNA condenses it forms chromosomes • Surrounded by a nuclear envelope/membrane with pores that control what goes in and out
Nucleus Job • Protects the DNA that controls the activities of the cell
Nucleolus Structure -Inside Nucleus Job -Makes rRNA which makes up ribosomes
Ribosomes Structure • Made of proteins and rRNA • Located on Rough ER and floating in cytoplasm
Ribosomes Job Job • Make proteins in a process called translation – Ribosomes on Rough ER make proteins to export out of cell – Ribosomes floating in cytoplasm make proteins to use within the cell rougher
Created by: emajors2415
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