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Cell Structure. Divisions of Cell Type Prokaryotes- – No Nucleus (Bacteria) Eukaryotes- – Nucleus (Animal cells. You)

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Presentation on theme: "Cell Structure. Divisions of Cell Type Prokaryotes- – No Nucleus (Bacteria) Eukaryotes- – Nucleus (Animal cells. You)"— Presentation transcript:

1 Cell Structure

2 Divisions of Cell Type Prokaryotes- – No Nucleus (Bacteria) Eukaryotes- – Nucleus (Animal cells. You)

3 Organization of the cell Plasma membrane - encompasses the functional cell unit – Membranes segregate most other individual components of the cell Nucleus Organelles Cytoplasm - suspension of fluid with various cellular elements

4 Plasma membrane is selectively permeable. This allows for isolated chemical environments.

5 How is the Double membrane possible ???

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7 The cytoplasm consists of a clear liquid (cytosol), a supportive cytoskeleton (that also aids in cell movement), and networks of membranes and organelles Inside the cell: Cytoplasm

8 Cytoplasm Cytoskeleton + Cytosol = Cytoplasm Cytosol - The clear fluid portion of the cytoplasm in which the particles are dispersed is called Cytosol – this contains mainly dissolved proteins, electrolytes, and glucose.

9 Cell Nucleus

10 Cell Membrane Nucleus Nucleolus

11  Inside the cell: Cell Nucleus:  large organelle bounded by a double-layered nuclear membrane  The site of cellular control  Holds genetic information—DNA & RNA  Contains chromatin  loosely coiled fibers of protein and DNA  Contains the nucleolus  composed of RNA and protein and is the site of ribosome production

12 Rough ER & Smooth ER

13  Inside the cell: Endoplasmic Reticulum (ER)  made up of membranes, flattened sacs, & vesicles  provides a tubular transport system inside the cell  Rough ER: ER + ribosomes-functions in protein synthesis  Smooth ER: ER without ribosomes-functions in lipid synthesis

14  Inside the cell: Ribosomes  Found attached to rough ER or scattered throughout the cytoplasm  Composed of protein and RNA  Functions in protein synthesis

15 Protein Synthesis and Transport

16  Inside the cell: Golgi Apparatus (GA)  composed of flattened sacs, and refines, packages, modifies, & delivers proteins  vesicles formed on ER travel to the GA  GA modifies vesicle contents chemically-prepares them for transport out of cell  Vesicles form a “delivery service”, carrying chemicals throughout the cell (vesicle trafficking).

17 Mitochondria

18  Inside the cell: Mitochondria  the “powerhouses” of the cell  contain enzymes needed for aerobic respiration (a form of efficient ATP production)  Very active cells contain thousands of mitochondria  example: skeletal muscle

19 Vesicle A small, membranous sac that can be used for transportation

20  Inside the cell: Lysosomes & Peroxisomes  Lysosomes are the "garbage disposals" of the cell & contain digestive enzymes to break up old cell components and bacteria  Peroxisomes contain enzymes that function in the synthesis of bile acids, breakdown of lipids, degradation of rare biochemicals, and detoxification of alcohol

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22 Using The List of Organelles Create a functional analogy 1.Cell membrane 2.Cytosol 3.Cytoskeleton 4.Nucleus 5.DNA 6.RNA 7.Smooth ER 8.Rough ER 9.Ribosomes 10.Mitochondria 11.Lysosomes 12.Peroxisomes 13.Golgi Apparatus Include a key explaining your analogy.

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