Cells Tissues and organs

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  • Created by: rcowling
  • Created on: 07-09-15 14:35
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  • Cells, Tissues and Organs
    • Animal cells have a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes.  What is the function of each of these?
      • Plant and algal cells also have a vacuole, cell wall and chloroplasts.  Why?
      • Bacterial cells have a cytoplasm and a cell membrane surrounded by a cell wall.  What do they importantly NOT have?
      • Yeast cells have a nucleus, cytoplasm and a membrane surrounded by a cell wall.
      • Cells may be specialised to carry out a particular function.  What is special about fat cells, cone cells, sperm cells and root hair cells?
    • Dissolved substances can move in and out of cells by diffusion.
      • They move down their concentration gradient from a region of ____ concentration to a region of ____ concentration.
      • Diffusion will be faster if it is hotter or if there is a bigger concentration difference.
      • Give two substances required for respiration that pass through cell membranes by diffusion.
    • An organism is made up of tissues, organs and organ systems.
      • A tissue is a group of cells with similar structure and function.  For example muscular tissue, glandular tissue and epithelial tissue.  What is the purpose of each of these tissues?
      • Organs are made of tissues.  One organ may contain several different tissues.  The stomach contains muscual, glandular and epithelial tissue.  Why would the stomach need each of these?
      • Organ systems are groups of organs that perform a particular function.  Which organs does the digestive system contain?  What is the purpose of each?
      • Plants organs include stems, roots and leaves.  The tissues which make up these organs are epidermal, mesophyll, xylem and phloem.  What is the purpose of each tissue?

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