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Cellular Sundae
Cellular Sundae

... cells, students should be able to justify their choice for each part (item should be similar to the real cell structure), place the appropriate number of each part in their cells (e.g. one nucleus, multiple ribosomes, etc.), and explain what each organelle does in the cell. When students switch part ...
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Cell Analogy Project - Warren Hills Regional School District
Cell Analogy Project - Warren Hills Regional School District

... Mitochondrion DNA   Cell wall cell membrane nuclear membrane  Chloroplast ribosomes cytoplasm ...
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AP Cell Organelles

... Intercellular junctions help integrate cells into higher levels of structure and function Neighboring cells in tissues, organs, or organ systems often adhere, interact, and communicate through direct physical contact. Plant cells are perforated with plasmodesmata, channels allowing cysotol to pass b ...
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Cells - Crossword Labs

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... I. Using the blank Venn diagram on the back side of this page, compare and contrast plant and animal cells. II. How does a bacteria cell compare to a plant cell? How does it compare to an animal cell? ...
Chapter 7 Cells - Beachwood City Schools
Chapter 7 Cells - Beachwood City Schools

... A. In the Nucleus: the nucleus contains most of a cell’s DNA. The DNA contains the coded instructions for making proteins and other important molecules. a. Nuclear envelope: a double membrane that surrounds the nucleus and separates it from the cytoplasm. b. Chromatin: granular material inside the n ...
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Cell Lab Standard
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... Prepare a wet mount of a whole Elodea leaf. Examine the leaf under the low power. Select a portion of the leaf where the cells are very distinct. Center this portion in the field of view and focus it under the high power. Use the fine adjustment knob to focus up and down on the various depths. As yo ...
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... -increases ATP production g. Number varies with type of cell h. only comes from EGG – not sperm during conception I. 1. Function a. maintains cell shape b. allows cell to move if it needs to c. d. dynamic process 2. Structure a. Actin filaments (old word was microfilaments) -long -flexible fibers -o ...
Cell Ultrastructure
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Cytoplasmic streaming



Cytoplasmic streaming, also called protoplasmic streaming and cyclosis, is the directed flow of cytosol (the liquid component of the cytoplasm) and organelles around large fungal and plant cells through the mediation of actin. This movement aids in the delivery of organelles, nutrients, metabolites, genetic information, and other materials to all parts of the cell. Cytoplasmic streaming occurs along actin filaments in the cytoskeleton of the cell.Cytoplasmic streaming was first discovered in the 1830s. The scientific breakthrough assisted scientists in developing an understanding of the different roles of cells and how they function as the basic operating systems of life.This process occurs through the operation of motor proteins called myosins.These proteins use energy of adenosine triphosphate (ATP) to act as a molecular motor, which slides along actin filaments. This works in a manner that tows the organelles and other cytoplasmic contents in the same direction. Myosin proteins consist of two conjoined proteins. If one protein remains attached to the substrate, the substance acted upon by the protein, such as a microfilament, has the ability to move organelles through the cytoplasm.The green alga genus Chara and other genera in the Division Charophyta, such as Coleochaete, are thought to be the closest relatives of land plants. These haploid organisms contain some of the largest plant cells on earth, a single cell of which can reach up to 10 cm in length. The large size of these cells demands an efficient means to distribute resources, which is enabled via cytoplasmic streaming.Cytoplasmic streaming is strongly dependent upon intracellular pH and temperature. It has been observed that the effect of temperature on cytoplasmic streaming created linear variance and dependence at different high temperatures in comparison to low temperatures. This process is complicated, with temperature alterations in the system increasing its efficiency, with other factors such as the transport of ions across the membrane being simultaneously affected. This is due to cells homeostasis depending upon active transport which may be affected at some critical temperatures.In plant cells, chloroplasts may be moved around with the stream, possibly to a position of optimum light absorption for photosynthesis. The rate of motion is usually affected by light exposure, temperature, and pH levels.In reference to pH, because actin and myosin are both proteins, strong dependence on pH is expected. The optimal pH at which cytoplasmic streaming is highest, is achieved at neutral pH and decreases at both low and high pH.The flow of cytoplasm may be stopped by:Adding Lugol's iodine solutionAdding Cytochalasin D (dissolved in dimethyl sulfoxide)↑ ↑ ↑ ↑ ↑ ↑
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