Transport and Membrane Potential
... H2O diffuses down its concentration gradient H2O concentration is less when there are more solutes Solutes have to be osmotically active cannot freely move across membrane H2O diffuses down its concentration gradient until its concentration is equal on both sides of a membrane Some cells have water ...
... H2O diffuses down its concentration gradient H2O concentration is less when there are more solutes Solutes have to be osmotically active cannot freely move across membrane H2O diffuses down its concentration gradient until its concentration is equal on both sides of a membrane Some cells have water ...
File - Ms. Adam`s science site
... o __________ - molecule with directions to control the cell o ____________________ - organelle that ___________________; site of protein synthesis ...
... o __________ - molecule with directions to control the cell o ____________________ - organelle that ___________________; site of protein synthesis ...
Passive Transport WS
... 10. A CONCENTRATION _G_ __ __ __ __ __ __ __ forms whenever there is a difference in concentration between one place and another. ...
... 10. A CONCENTRATION _G_ __ __ __ __ __ __ __ forms whenever there is a difference in concentration between one place and another. ...
1.1-BIO-HOM-HomeostasisIntro.CellMembrane
... Where are proteins found in the membrane? • Within the two layers, proteins are found. • These proteins help molecules to cross through the membrane, and it’s also a way that the cell can communicate with its environment ...
... Where are proteins found in the membrane? • Within the two layers, proteins are found. • These proteins help molecules to cross through the membrane, and it’s also a way that the cell can communicate with its environment ...
1 - Alex LeMay – Science
... ribosome from a human cell and a ribosome from a bacteria cell would reach which conclusion? (GENERATING) HINT: What does cell theory say? mmm. The human ribosome is larger than the bacteria ribosome. nnn. The bacteria ribosome works faster than the human ribosome. ooo. The two ribosomes function si ...
... ribosome from a human cell and a ribosome from a bacteria cell would reach which conclusion? (GENERATING) HINT: What does cell theory say? mmm. The human ribosome is larger than the bacteria ribosome. nnn. The bacteria ribosome works faster than the human ribosome. ooo. The two ribosomes function si ...
Name: Date: Period Cells WebQuest (revised mgolenberke 2015
... Part I: Open up the app 3D Cell Simulation and Stain Tool on your iPad. (original worksheet) Go to 3D Cell Explore Click on “Structures” on the right tool bar (Do not worry about peroxisomes, autophagosomes, or the two different types of cytoskeleton (actin and tubulin)) Answer the following quest ...
... Part I: Open up the app 3D Cell Simulation and Stain Tool on your iPad. (original worksheet) Go to 3D Cell Explore Click on “Structures” on the right tool bar (Do not worry about peroxisomes, autophagosomes, or the two different types of cytoskeleton (actin and tubulin)) Answer the following quest ...
AP Bio membranes
... concentration gradient, requiring energy from the cell. • Sodium-potassium pump allows cells to exchange Na+ and K+ across animal cell membranes. ...
... concentration gradient, requiring energy from the cell. • Sodium-potassium pump allows cells to exchange Na+ and K+ across animal cell membranes. ...
Passive Transport
... known as passive transport. When energy is needed, the movement is known as active transport. Simple Diffusion ...
... known as passive transport. When energy is needed, the movement is known as active transport. Simple Diffusion ...
Isabel Hoyt Membrane
... 12. What is the relationship between ion channels, gated channels and facilitated diffusion? Facilitate diffusion is when the membrane diffuses passively with the help of transport proteins that span the membrane. Ion channels, many which function as gate channels stimulus causes them to open or cl ...
... 12. What is the relationship between ion channels, gated channels and facilitated diffusion? Facilitate diffusion is when the membrane diffuses passively with the help of transport proteins that span the membrane. Ion channels, many which function as gate channels stimulus causes them to open or cl ...
File
... 2. Why do cells interact with their environment? 3. What structure do molecules pass through when entering or leaving the cell? 4. What type of transport requires no energy and includes diffusion and osmosis? 5. What is a concentration gradient? 6. What term is used to describe the diffusion of wate ...
... 2. Why do cells interact with their environment? 3. What structure do molecules pass through when entering or leaving the cell? 4. What type of transport requires no energy and includes diffusion and osmosis? 5. What is a concentration gradient? 6. What term is used to describe the diffusion of wate ...
Document
... • allows for isolation of each individual organelle - so that the interior of each organelle does not mix with the cytosol -known as compartmentalization • BUT - cellular compartments must “talk” to each other • therefore the cell requires a well-coordinated transport system in order for the organel ...
... • allows for isolation of each individual organelle - so that the interior of each organelle does not mix with the cytosol -known as compartmentalization • BUT - cellular compartments must “talk” to each other • therefore the cell requires a well-coordinated transport system in order for the organel ...
Cell polarity in early C. elegans development
... progeny. The eventual differences between the fates of the left and right AB progeny must be established later via interactions with other cells. The skewing of the AB progeny at the six-cell stage causes AB cells on the right and left sides to have different neighbors later in embryogenesis: these ...
... progeny. The eventual differences between the fates of the left and right AB progeny must be established later via interactions with other cells. The skewing of the AB progeny at the six-cell stage causes AB cells on the right and left sides to have different neighbors later in embryogenesis: these ...
Osmosis Experimental Design Lab
... Osmosis Experimental Design Lab Background: Recall from discussions in class that cells use transport methods such as diffusion, osmosis, and active transport to allow substances to cross their cell membrane. Some transport methods are considered passive because they do not require the cell to expen ...
... Osmosis Experimental Design Lab Background: Recall from discussions in class that cells use transport methods such as diffusion, osmosis, and active transport to allow substances to cross their cell membrane. Some transport methods are considered passive because they do not require the cell to expen ...
1 Cell Organelles in Plant and Animal Cells
... www.ck12.org Below are the main organelles found in eukaryotic cells ( Figure below): 1. The cell wall both protects and supports the cell. It is made of non-living cellulose. The cell wall is only found in plant cells. 2. The cell membrane controls what enters and leaves the cell. It also protects ...
... www.ck12.org Below are the main organelles found in eukaryotic cells ( Figure below): 1. The cell wall both protects and supports the cell. It is made of non-living cellulose. The cell wall is only found in plant cells. 2. The cell membrane controls what enters and leaves the cell. It also protects ...
Slide 1
... Cell walls maintain the cell’s shape, the direction of growth, and provide structural support. Not all living things have cell walls. Plant cells have a lot of chemicals added into their cell walls such as cellulose and lignin (for plant structure). The cell wall is located outside the plasma membra ...
... Cell walls maintain the cell’s shape, the direction of growth, and provide structural support. Not all living things have cell walls. Plant cells have a lot of chemicals added into their cell walls such as cellulose and lignin (for plant structure). The cell wall is located outside the plasma membra ...
Mitochondria use actin filaments as rails for fast translocation in
... shows that mitochondria and peroxisomes in Arabidopsis and tobacco move quickly and over long distances and that the movement depends on actin. Our results are consistent with the in vivo results of Van Gestel et al. (2002) and the in vitro results of Romagnoli et al. (2007). At least four types of ...
... shows that mitochondria and peroxisomes in Arabidopsis and tobacco move quickly and over long distances and that the movement depends on actin. Our results are consistent with the in vivo results of Van Gestel et al. (2002) and the in vitro results of Romagnoli et al. (2007). At least four types of ...
CELL MEMBRANE AND TRANSPORT A. Plasma Membrane
... of lesser concentration across a selectively-permeable membrane. a special case of diffusion Solute: particles which are dissolved in water Solvent: liquid which dissolves the solute. This is water when we are talking about osmosis. Solution: combination of solute and solvent. Osmotic Pressure: the ...
... of lesser concentration across a selectively-permeable membrane. a special case of diffusion Solute: particles which are dissolved in water Solvent: liquid which dissolves the solute. This is water when we are talking about osmosis. Solution: combination of solute and solvent. Osmotic Pressure: the ...
Movement through the cell membrane Power Point
... freely cross the membrane as it enters or leaves the cell. B. Carrier proteins (Transport)- a protein that selectively interacts with a specific molecule or ion so that it can cross the cell membrane to enter or exit the cell. C. Receptor proteins - A protein that has a specific shape so that specif ...
... freely cross the membrane as it enters or leaves the cell. B. Carrier proteins (Transport)- a protein that selectively interacts with a specific molecule or ion so that it can cross the cell membrane to enter or exit the cell. C. Receptor proteins - A protein that has a specific shape so that specif ...
Cell Membranes
... 2. Receptor proteins – these proteins recognize “signals” or “messages” from their environment and can induce biological responses within the cells. 3. Recognition proteins - these proteins allow the cell to be “recognized” by other cells. In multicellular organisms, these proteins are involved in s ...
... 2. Receptor proteins – these proteins recognize “signals” or “messages” from their environment and can induce biological responses within the cells. 3. Recognition proteins - these proteins allow the cell to be “recognized” by other cells. In multicellular organisms, these proteins are involved in s ...
Chapter 4 A Tour of the Cell
... • The cytoskeleton is composed of three kinds of fibers – Microfilaments (actin filaments) support the cell’s shape and are involved in motility – Intermediate filaments reinforce cell shape and anchor organelles – Microtubules (made of tubulin) shape the cell and act as tracks for motor protein ...
... • The cytoskeleton is composed of three kinds of fibers – Microfilaments (actin filaments) support the cell’s shape and are involved in motility – Intermediate filaments reinforce cell shape and anchor organelles – Microtubules (made of tubulin) shape the cell and act as tracks for motor protein ...
Extracurricular Activities
... need for survival. Also stores waste products and water. Plants retain rigidity by increasing pressure/amount of water in vacuole (plants wilt if vacuoles are not filled). Can occupy anywhere from 30-95% of plant cell. In animal cells, stores waste to keep rest of cell uncontaminated (to be disposed ...
... need for survival. Also stores waste products and water. Plants retain rigidity by increasing pressure/amount of water in vacuole (plants wilt if vacuoles are not filled). Can occupy anywhere from 30-95% of plant cell. In animal cells, stores waste to keep rest of cell uncontaminated (to be disposed ...
C2006/F2402 `14 Outline Of Lecture #2 -
... more difficult and expensive than preparation of ordinary, unlabeled, antibody.) (a). A different primary antibody is used for each target protein. (Not labeled -no tag.) Variable part of primary antibody binds to specific part of target protein. (b). The secondary antibody binds to the constant par ...
... more difficult and expensive than preparation of ordinary, unlabeled, antibody.) (a). A different primary antibody is used for each target protein. (Not labeled -no tag.) Variable part of primary antibody binds to specific part of target protein. (b). The secondary antibody binds to the constant par ...
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)↑ ↑ ↑ ↑ ↑ ↑