Topic 2: Cells 2.1 Cell Theory 2.1.1: Outline cell theory Living organisms are composed of cells Cells are the smallest unit of life Cells come from pre-existing cells 2.1.2: Discuss the evidence for cell theory Humans have not been able to find any living thing that is not made up of at least one cell Robert Hooke first described cells when looking at cork through a microscope Louis Pasteur´s experiments: he discovered that all cells must come fom pre-existing cells 2.1.3: State that
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three terms with their definitions: 1. Sarcolemma __2__ endoplasmic reticulum in muscle cell 2. Sarcoplasmic reticulum __3__ intracellular fluid around organelles 3. Cytosol __1__ plasma membrane of muscle cell 6. Match the following three terms with their definitions: 1. Terminal cisternae __3__ T tubule + 2 terminal cisternae 2. T tubules __2__ part of sarcolemma—carries action potential 3. Triad __1__ part of sarcoplasmic reticulum—stores calcium ions 7. Myofibrils consist of contractile
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sarcomere‚ there is the sarcolemma. Sarcolemma is the plasma membrane of skeletal muscle cells. Sarcolemma extends to separate the sarcomeres. T tubules (transverse tubules) which are responsible for allowing the flow of calcium into the sarcoplasmic reticulum (SR) invaginate the sarcolemma. The sarcolemma is not only for protection‚ but is also a means of communication for nerve impulses that cause the muscle to contract. Longitudinal tubules or myofilaments connect the T tubules to the sarcolemma. Bundled
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terms with their definitions: 2 Sarcolemma Sarcoplasmic reticulum Cytosol 6. - endoplasmic reticulum in muscle cell 3 - intracellular fluid around organelles - plasma membrane of muscle cell 1 Match the following three terms with their definitions: Terminal cisternae 3 - T-tubule + 2 terminal cisternae T-tubules 2 Triad 1 7. - part of sarcolemma—carries action potential - part of sarcoplasmic reticulum—stores calcium ions Myofibrils consist of contractile proteins
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Prokaryotic and eukaryotic cells are both vital to our world today. Prokaryotic cells are simple‚ yet the oldest‚ and were known to evolve around 3.5 billion year ago. Eukaryotic cells are more complex and have been said to appear on Earth 2.5 billion years ago. It is sort of like people or characters in movies. You see them one year and basically understand what they’re doing or going through and then a year or two from now they seem like they become more complicated to understand. That’s just
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Chapter 3 Cloze Notes CORNELL NOTES UNIT 2: Cells Directions: Create a Chapter 3: Cell Structure and Function minimum of 5 questions in this column per page I. Cell Theory (Section 3.1) (average). You can use these questions during class A. Early studies led to the development of the cell theory or tutorial to better understand a topic; or at home to better understand 1. Discovery of Cells your notes and prepare for tests and quizzes. a. Robert __________ (1665)—Used compound microscope to
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*Usually in the center of the cell. Contains the cells genetic information (DNA) 5. Vacuole- *Plant cells contain a much larger central vacuole 6. Endoplasmic Reticulum- *Modifies components of the cell membrane and some proteins. Rough ER- Contains ribosomes. Smooth ER- No Ribosomes 7. Ribosome- *Can be attached to endoplasmic reticulum (ER) or floating free in cytoplasm 8. Lysosome- 9. Golgi complex- *Proteins from the ER are sent here. The Golgi Complex is in charge of
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wetlands‚ and the guts of animals. This is a diagram of a prokaryote cell and it shows that they are not very complex cells. They do not contain any membrane bound organelles and they have relatively small ribosomes. They also do not contain and endoplasmic reticulum.1 The DNA is not stored in a nucleus but it is stored in the nucleoid. DNA in the cytoplasm and many prokaryotic cells also contain very small loops of DNA called plasmids. The nucleoid region is the area of the cytoplasm‚ which contains the
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2.5.1 Cell Structure Vocabulary: cell wall‚ centriole‚ chloroplast‚ cytoplasm‚ endoplasmic reticulum‚ Golgi apparatus‚ lysosome‚ mitochondria‚ nuclear envelope‚ nucleolus‚ nucleus‚ organelle‚ plasma membrane‚ plastid‚ ribosome‚ vacuole‚ vesicle Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. What are some of the structures inside a cell that help it to live and perform its role in an organism? ______Mitochondria‚ nucleus‚ ribosome’s. __________________________________________________________
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Small Ribosomal Subunit at 3.3A Resolution [5] - http://www.unitus.it/scienze/corsonew/lezione11.html [6] – Cell Biology‚ second edition. Thomas D. Pollard and William C. Earnshaw. Saunders Elsevier. [7] - http://biology.about.com/od/cellanatomy/ss/endoplasmic-reticulum.htm [8] -http://www.bscb.org/?url=softcell/er [9] – Structure and Function of the Nucleolus‚ Current opinions in cell biology June 11th 1999‚ Scheer U‚ Hock R‚ [10] - http://www.ncbi.nlm.nih.gov/books/NBK21624/figure/A4351/?report=objectonly
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