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CELLS-A STUDY GUIDE CHECKLIST
CELLS-A STUDY GUIDE CHECKLIST

... CELLS-A STUDY GUIDE CHECKLIST In order to do well on the test the following is a list of what you will need to know: I. II. ...
Cell Structure and Function
Cell Structure and Function

... • Surface area represents the “access” available to and from a cell for supplies. • Volume represents how much has to be supplied. • The more “access” you have to supply each unit of volume, the more efficient the cell is. ...
unit 4 overview
unit 4 overview

... reactions that occur in specialized areas of the organism's cells. As a basis for understanding this concept: a. Students know cells are enclosed within semi permeable membranes that regulate their interaction with their surroundings. b. Students know how prokaryotic cells, eukaryotic cells (includi ...
Cell parts practice
Cell parts practice

... ______ Phospholipid bilayer that controls what enters and leaves the cell ______ Found outside of the cell membrane in plants & bacteria; provides support & protection ...
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... 2. Read the description of the centrioles. What is their function? ________________________ _________________________________________________________________________ _________________________________________________________________________ ...
LTM-1000 Powerpoint Presentation
LTM-1000 Powerpoint Presentation

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Ch 3 Notes Outline
Ch 3 Notes Outline

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5.2.1 Recall the cell as the smallest unit of life and identify its major

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Chapter 3 Section 3
Chapter 3 Section 3

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Endocytosis - Cloudfront.net

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Cell Organelle Web Quest

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The Cell Theory
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... 2) Use the information and the figure below to answer the following. The diagram below shows a colony of prokaryotes and a single-celled eukaryote. The eukaryote contains organelles that resemble the three types of bacteria found in the colony of prokaryotes. More than a billion years ago, bacteria ...
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designing a cell city - Milton

... 1. The nucleus is a large, round/oval structure usually located near the center of the cell. It is the control center for all the activities of the cell. 2. The cell membrane is a thin, flexible envelope that surrounds the cell. It allows the cell to change shape and controls what goes into and out ...
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The cytoskeleton The cell surface and junctions

... (b) Motor molecules can also attach to receptors on organelles such as vesicles and enable the organelles to "walk" along microtubules of the cytoskeleton. For example, vesicles containing neurotransmitters migrate to the tips of axons, the long extensions of nerve cells that release transmitter mol ...
PARTS OF THE CELL CELL ORGANELLES
PARTS OF THE CELL CELL ORGANELLES

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Cell and Molecular Biology
Cell and Molecular Biology

... This is a typical prokaryotic bacterial cell and shows the following features all of which are mentioned in the monograph P2 ...
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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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