Structure of Epithelial cell

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kc97
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247337
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Structure of Epithelial cell
Updated:
2016-01-16 19:28:26
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Structure Epithelial cell
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AS Biology Unit 2
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Structure of Epithelial cell
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  1. What is the nucleus and its size?(2 marks)
    • A large organelle surrounded by nuclear envelopes which contains many pores.
    • 20 micrometres
  2. What is the function of the nucleus? (3 marks)
    • Controls cell through the production of mRNA
    • Retain genetic material of the cell 
    • Manufactures ribosomal RNA and ribosomes
  3. What is the mitochondria and its size?( 2 marks)
    • A rod shape organelle
    • 1-10 micrometres
  4. What is the function of the mitochondria? 2MARKS
    • Site of aerobic respiration( Krebs cycle and oxidative phosphorylation pathway)
    • Responsible for creating ATP
  5. A large organelle surrounded by nuclear envelopes which contains many pores.
    Controls cell through the production of mRNA
    Retain genetic material of the cell 
    Manufactures ribosomal RNA and ribosomes
    Nucleus
  6. A rod shape organelle
    Site of aerobic respiration( Krebs cycle and oxidative phosphorylation pathway)
    Responsible for creating ATP
    Mitochrondria
  7. What the function of the smooth endoplasmic membrane?
    • Synthesis, store and transport lipids.
    • Synthesis, store and transport carbohydrates
  8. What the function of the rough endoplasmic membrane?
    • Provides a large surface area of for the synthesis of proteins and glycoprotein.
    • Provide a pathway for the transport of materials
  9. Provides a large surface area of for the synthesis of proteins and glycoprotein.
    Provide a pathway for the transport of materials
    Rough endoplasmic membrane
  10. Synthesis, store and transport lipids.
    Synthesis, store and transport carbohydrates
    Rough endoplasmic membrane
  11. What is the Golgi apparatus?
    A stack of membranes that make up cisternae, with vesicles
  12. What is the function of the Golgi apparatus?(5 marks)
    • Add carbohydrates to proteins to produce glycoprotiens
    • Produce secretory enzymes
    • Secrete Carbohydrates
    • Transport, modify and store lipids
    • Form lysosomes
  13. Add carbohydrates to proteins to produce glycoprotiens
    Produce secretory enzymes
    Secrete Carbohydrates
    Transport, modify and store lipids
    Form lysosomes
    Golgi Apparatus
  14. What are lysosomes and how are they formed?(2 marks)
    • Vesicles containing enzymes
    • Produced by golgi apparatus
  15. What the function of a lysosome?(4 marks)
    • Break down material ingested by phagocytic cells (e.g whit blood cells)
    • Release enzymes outside of the cell in order to destroy material around it (exocytosis)
    • Digest worn out organelles so that useful chemical can be reused 
    • Break down cells after they died (autolysis)
  16. Break down material ingested by phagocytic cells (e.g whit blood cells)
    Release enzymes outside of the cell in order to destroy material around it (exocytosis)
    Digest worn out organelles so that useful chemical can be reused Break down cells after they died (autolysis)
    Lysosome
  17. What are ribosome and what do they contain? (2 marks)
    • Small cytoplasmic granules attached to rough ER or float in cytoplasm
    • Contain ribosomal RNA and protein
  18. What are the function of ribosome?
    Site where protein are made
  19. Site where protein are made
    Ribosome
  20. What are the two types of ribosomes and where can they be found? (2 marks)
    • 70s type- prokaryotic cells smaller
    • 80s type- eukaryotic cells 25nm
  21. 70s type ribosomes?
    Prokaryotic Cells
  22. 80s type ribosomes
    Eukaryotic cells
  23. What are microvilli?
    Folds in plasma membrane
  24. Increase surface area for efficient absorption
    microvilli
  25. What the function of microvilli?
    Increase surface area for efficient absorption

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