• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Chloroplast Mitochondria Cell Membrane Golgi Apparatus Cell Wall
Chloroplast Mitochondria Cell Membrane Golgi Apparatus Cell Wall

... 2. All life functions are performed by individual cells or groups of cells. 3. Cells come from other cells by ...
Structures and Functions in living organisms
Structures and Functions in living organisms

... • Jelly like substance which contains all of the organelles. • Many of the cell’s chemical reactions take place in the cytoplasm. • These are called metabolic reactions. ...
Write your answer on a separate sheet of paper
Write your answer on a separate sheet of paper

... Use the following questions as practice questions for your test on cell structure and functions. The test will include questions about: biomolecules, the parts of the cell, enzymes, and the cell membrane. Answer each question that is not a picture to label or a chart to fill out on a separate piece ...
Name
Name

... Living cells maintain a (1) __________________ by controlling materials that enter and leave. Without this ability, the cell cannot maintain (2) _____________and will die. The cell must regulate internal concentrations of water, (3) ______________________, and other nutrients and must eliminate wast ...
Cell Analogy Project - Milton
Cell Analogy Project - Milton

... Cell Analogy Project Biology Due __10/16/15_____ An analogy is defined as a “resemblance in some particulars between things otherwise unlike” (Webster’s New Collegiate Dictionary). For this project, you are going to create analogies for either the structure or function of various cellular organelles ...
Transporting Materials Across the Cell Membrane
Transporting Materials Across the Cell Membrane

... • Active transport is the movement of a substance from a region of low conc to a region of high conc with the expenditure of energy • Without active transport, your kidneys would not reabsorb precious water, your muscles would not contract, and your nerves could not carry impulses. ...
Chapter 3: cells
Chapter 3: cells

... •An animal cell placed in a hypertonic solution will lose water and shrink (crenation). •Hypotonic solution - a solution that has a lower solute ...
INFECTIOUS BIOFE
INFECTIOUS BIOFE

...  Hypertonic Solution: Concentration of the cell is less than outside of the cell.  Water moves out of the cell to try to even out the concentration. Cell Shrinks (Plasmolysis)  Isotonic Solution: The cell has a equal proportion of concentration with the area surrounding.  Water continually flows ...
No Slide Title
No Slide Title

...  changes in cell location  limited movements of parts of cell  interacts with motor proteins- dynein  In cilia and flagella  also in muscle cells  circulate materials within cell by cytoplasmic Cilia kinesin flagella streaming ...
KONTRAK KULIAH & STRUKTUR DAN FUNGSI SEL
KONTRAK KULIAH & STRUKTUR DAN FUNGSI SEL

... contact with the environment • The cytoplasm contains organelles • Many organelles have membranes as boundaries – These compartmentalize the interior of the cell ...
Structure and Function of the Cell
Structure and Function of the Cell

...  Most are roughly cuboidal or spherical  Some change shape (white blood cells) ...
Powerpoint
Powerpoint

... Endocytosis is the process used to ingest materials and bring them inside the cell. Due to the fluidity of the plasma membrane it is able to fold around materials in the external environment and bring them inside within a small pouch called a vesicle. Once inside the cell these vesicles often fuse w ...
Name: : :___ PLASMA MEMBRANE QUESTIONS 1. The cell
Name: : :___ PLASMA MEMBRANE QUESTIONS 1. The cell

... • catalyzes a specific reaction • shaped so specific molecules bind to it • allows a specific ion or substance to enter or exit the cell • carries material across the cell membrane during active transport/ facilitated transport any one for 1 mark 11. Molecules in the cell membrane that function as r ...
N Level Science Biology Examination Notes
N Level Science Biology Examination Notes

... the cells from collapsing under the negative pressure under which xylem tissue functions. - They form continuous hollow structures that allow easy movement of water and mineral salts. - They also provide strength and support for the plant. Function - Xylem transports water and dissolved mineral salt ...
Turgor Pressure Pages 32
Turgor Pressure Pages 32

... Turgor Pressure Pages 32 The pressure produced when water pressure outside the cell is higher than pressure inside. Water molecules will enter the cell by osmosis. Water fills the vacuole and cytoplasm causing swelling. This water will push against the cell wall. This outward pressure is known as tu ...
The Cell - Ardsley Schools
The Cell - Ardsley Schools

... Mitochondria and Chloroplasts evolved from bacteria that were gobbled up by an ancient Cell. These organisms then lived inside the ancient cell and were a benefit to the ancient cell (endosymbiosis) ...
Chapter 6 Notes and Outline - Bremen High School District 228
Chapter 6 Notes and Outline - Bremen High School District 228

... - Fluid filled space enclosed by inner membrane (MATRIX) CONTAINS DNA, ribosomes, enzymes for cellular respiration • Site of cellular respiration - Break down sugars, fats, and other fuels in the presence of oxygen - Generate ATP • Cells with high energy needs (EX: muscle cells) have large numbers o ...
Project - ArtsNow Learning
Project - ArtsNow Learning

... Units provide differentiated ideas and activities aligned to a sampling of standards. The units do not necessarily imply mastery of standards, but are intended to inspire and equip educators. Produced through the U.S. Department of Education: Arts in Education—Model Development and Dissemination Gra ...
Cell - msos
Cell - msos

... Do not have a nucleus or membrane enclosed organelles. • They are single celled organisms e.g. Bacteria • Their DNA is found as circular loops found in the cytoplasm. ...
Movement of materials in and out of cells
Movement of materials in and out of cells

... wall (causes pressure = turgor pressure). The cell wall pushes back against the cell membrane. The cell expands but does not burst. Note: turgor pressure maintains structural rigidity in herbaceous (non-woody) plants. Can you explain how wilting occurs? ...
Cell Organelle Pre Test - Gulf Coast State College
Cell Organelle Pre Test - Gulf Coast State College

... SC.6.N.3.4 – Identify the role of models in the context of 6th grade science benchmarks. ...
Unit 2: Cell Biology Study Guide
Unit 2: Cell Biology Study Guide

... 19. cellular respiration: the process of producing ATP in the cell from oxygen and sugar which releases carbon dioxide and water Fill in the blank 20. Plants and animals are eukaryotic cells because they have membrane-bound organelles. 21. Two organelles found in plant cells, but not animal cells, ...
Functions of the Plasma Membrane
Functions of the Plasma Membrane

... Functions of the Plasma Membrane "Cell Transport" The cell's plasma membrane does not simply form a "sack" in which to keep all the cytoplasm  and other cellular organelles. The plasma membrane is a very important structure which  functions to allow certain substances to enter or leave the cell. It  ...
Ear12a - Viktor`s Notes for the Neurosurgery Resident
Ear12a - Viktor`s Notes for the Neurosurgery Resident

...  processes of hair cells project into ENDOLYMPH whereas bases are bathed in PERILYMPH.  PERILYMPH is formed mainly from plasma resembles extracellular fluid.  ENDOLYMPH is formed by stria vascularis and has high K+ concentration and low Na+ concentration; in addition, stria vascularis has unique ...
Cell Parts and Functions
Cell Parts and Functions

... 2. Some of the most important jobs in the cell include making and transporting proteins, releasing energy from food, controlling what enters and leaves the cell, and getting rid of wastes. B. While plant and animal cells have several of the same organelles, there are some structures that are found o ...
< 1 ... 209 210 211 212 213 214 215 216 217 ... 393 >

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)↑ ↑ ↑ ↑ ↑ ↑
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report