Presentation
... • Some molecules cannot easily diffuse across the cell membrane. • Facilitated diffusion is diffusion through transport ...
... • Some molecules cannot easily diffuse across the cell membrane. • Facilitated diffusion is diffusion through transport ...
Osmosis and Diffusion
... Selectively Permeable = cell membrane will only allow some things through! Large macromolecules and charged ions can NOT get through the lipid bi-layer!!! ...
... Selectively Permeable = cell membrane will only allow some things through! Large macromolecules and charged ions can NOT get through the lipid bi-layer!!! ...
Na +
... surroundings, a process controlled by the plasma membrane • Plasma membranes are selectively permeable, regulating the cell’s molecular traffic • Hydrophobic (nonpolar) molecules, such as hydrocarbons, can dissolve in the lipid bilayer and pass through the membrane rapidly • Polar molecules, such as ...
... surroundings, a process controlled by the plasma membrane • Plasma membranes are selectively permeable, regulating the cell’s molecular traffic • Hydrophobic (nonpolar) molecules, such as hydrocarbons, can dissolve in the lipid bilayer and pass through the membrane rapidly • Polar molecules, such as ...
CH 6 Notes
... to run daily life & growth, the cell must… read genes (DNA) build proteins structural proteins (muscle fibers, hair, skin, claws) enzymes (speed up chemical reactions) signals (hormones) & receptors ...
... to run daily life & growth, the cell must… read genes (DNA) build proteins structural proteins (muscle fibers, hair, skin, claws) enzymes (speed up chemical reactions) signals (hormones) & receptors ...
Chapter 2 Reading Guide
... 1. All organisms and their cells must respond to external conditions to _maintain _ _stability_. This is called maintaining _homeostasis__. 2. Movement across the membrane that does not require energy from the cell is called _passive_ __transport__. A difference in the concentration of a substance a ...
... 1. All organisms and their cells must respond to external conditions to _maintain _ _stability_. This is called maintaining _homeostasis__. 2. Movement across the membrane that does not require energy from the cell is called _passive_ __transport__. A difference in the concentration of a substance a ...
Cell 2
... does not seem like a structural differentium. If we allow this then we presumably also allow subclasses with differentia such as avian, mammalian etc. This will give us multifaceted classes such as {mammalian,avian}{nucleated,non-nucleated} cell, which leads to multiple inheritance – anathema to the ...
... does not seem like a structural differentium. If we allow this then we presumably also allow subclasses with differentia such as avian, mammalian etc. This will give us multifaceted classes such as {mammalian,avian}{nucleated,non-nucleated} cell, which leads to multiple inheritance – anathema to the ...
Yahel_et_al_LO_2007
... water was sucked into the SIP, we used 10-cm inlet tubing with a 508-mm internal diameter that delivered an initial suction rate of ,1 mL s21 at working conditions (145 m in depth, 8uC, 33%). Since DP and sampling rate decreased exponentially with sampling time, we sampled for a minimum of 5 min. Th ...
... water was sucked into the SIP, we used 10-cm inlet tubing with a 508-mm internal diameter that delivered an initial suction rate of ,1 mL s21 at working conditions (145 m in depth, 8uC, 33%). Since DP and sampling rate decreased exponentially with sampling time, we sampled for a minimum of 5 min. Th ...
Unit 3: Microscopes and Cells
... Temporary storage space for water, waste, and nutrients (animals usually have small or none) ...
... Temporary storage space for water, waste, and nutrients (animals usually have small or none) ...
The Cell Membrane
... When molecules are dispersed evenly, there is no longer diffusion (& not longer a concentration gradient) because the molecules are evenly distributed throughout the space they occupy. ...
... When molecules are dispersed evenly, there is no longer diffusion (& not longer a concentration gradient) because the molecules are evenly distributed throughout the space they occupy. ...
Diffusion, Osmosis, And Some Others…
... – Lower concentration of dissolved particles in solution – So water molecules are more concentrated outside cell, causing water to rush into the cell. – Cell membrane could potentially expand until it bursts. ...
... – Lower concentration of dissolved particles in solution – So water molecules are more concentrated outside cell, causing water to rush into the cell. – Cell membrane could potentially expand until it bursts. ...
Cells have - Staff UNY
... • Mitochondria are in nearly all eukaryotic cells • They have a smooth outer membrane and an inner membrane folded into cristae • The inner membrane creates two compartments: intermembrane space and mitochondrial matrix • Some metabolic steps of cellular respiration are catalyzed in the mitochondria ...
... • Mitochondria are in nearly all eukaryotic cells • They have a smooth outer membrane and an inner membrane folded into cristae • The inner membrane creates two compartments: intermembrane space and mitochondrial matrix • Some metabolic steps of cellular respiration are catalyzed in the mitochondria ...
Cell Webquest
... ! Click on “Animal Cell” Read the text and follow the directions. (Click on each organelle and read about what it does) 3) Name and define 3 of the organelles that we are learning about. ! Click “continue” and answer the “Pop-up Questions.” When you are finished, click on “Plant cell” and read the t ...
... ! Click on “Animal Cell” Read the text and follow the directions. (Click on each organelle and read about what it does) 3) Name and define 3 of the organelles that we are learning about. ! Click “continue” and answer the “Pop-up Questions.” When you are finished, click on “Plant cell” and read the t ...
Membrane-active antimicrobial drugs—a reappraisal of their mode
... The second discovery, and one which has a much greater bearing on the problem under review, concerns the soh~tion to the phenomenon of energy coupling. For many years biochemists had sought to explain how metabolic activity could drive such processes as active transport and oxidative and substrate l ...
... The second discovery, and one which has a much greater bearing on the problem under review, concerns the soh~tion to the phenomenon of energy coupling. For many years biochemists had sought to explain how metabolic activity could drive such processes as active transport and oxidative and substrate l ...
mitosis
... move to opposite poles pulled at centromeres pulled by motor proteins “walking”along microtubules ...
... move to opposite poles pulled at centromeres pulled by motor proteins “walking”along microtubules ...
1 mark
... Only black and white images; can’t see actual colour of specimen Specimens must be dead; ( so can’t observe cell function) Can only view one very thin vertical section at a time; no depth to the cells viewed 2 marks c) State two features which would be used to identify either or both of the ab ...
... Only black and white images; can’t see actual colour of specimen Specimens must be dead; ( so can’t observe cell function) Can only view one very thin vertical section at a time; no depth to the cells viewed 2 marks c) State two features which would be used to identify either or both of the ab ...
Membranes
... ◦ Molecules that cannot cross membrane easily may move through proteins ◦ Move from higher to lower concentration- down their concentration gradient animation ◦ Channel proteins ...
... ◦ Molecules that cannot cross membrane easily may move through proteins ◦ Move from higher to lower concentration- down their concentration gradient animation ◦ Channel proteins ...
Cell parts worksheet
... Mitochondria: (singular: mitochondrion) Sometimes referred to as the powerhouse of the cell. Folded inner membrane increases surface area for chemical reactions to take place. Organelle where aerobic cellular respiration occurs. Most of the ATP - energy currency of cells - is produced here Micr ...
... Mitochondria: (singular: mitochondrion) Sometimes referred to as the powerhouse of the cell. Folded inner membrane increases surface area for chemical reactions to take place. Organelle where aerobic cellular respiration occurs. Most of the ATP - energy currency of cells - is produced here Micr ...
CHAPTER 5: CELL STRUCTURE
... Many of the structural differences between prokaryotes and eukaryotes are visible at the level of the light microscope; the presence of the nucleus in eukaryotes, for example. The nuclear material in prokaryotes is a single, circular strand of DNA, unencumbered by either proteins or a surrounding me ...
... Many of the structural differences between prokaryotes and eukaryotes are visible at the level of the light microscope; the presence of the nucleus in eukaryotes, for example. The nuclear material in prokaryotes is a single, circular strand of DNA, unencumbered by either proteins or a surrounding me ...
6.3 Transport revised
... Predict the results What do you predict will happen if food coloring is dropped into a beaker of water? ...
... Predict the results What do you predict will happen if food coloring is dropped into a beaker of water? ...
THE CELL model: Activity 4.1 – Science / Biology Objective: On a
... away items. Purchased models or items purchased for the purpose of model building will receive lower scores – Creativity is an expectation of this assignment ...
... away items. Purchased models or items purchased for the purpose of model building will receive lower scores – Creativity is an expectation of this assignment ...
biology april assignment-form 4
... a) What is the formula for calculating linear magnification of a specimen when using a hand lens ...
... a) What is the formula for calculating linear magnification of a specimen when using a hand lens ...
organelle Part of Grant City Purpose in the city Purpose in the cell
... Network of membranes throughout the cell. Moves materials and aids in protein production. Contains the DNA which has the instructions for protein making. ...
... Network of membranes throughout the cell. Moves materials and aids in protein production. Contains the DNA which has the instructions for protein making. ...
Week of 100316 Lesson Plan
... What is the relationship between mitochondria and chloroplasts? Key Vocabulary Cell theory, macromolecule, nucleuic acid,protein, lipid, carbohydrate, cell membrane, cell wall, cytoplasm, cytoskeleton, organelle, nucleus, chloroplast, passive transport, diffusion, osmosis, facilitative diffusion, a ...
... What is the relationship between mitochondria and chloroplasts? Key Vocabulary Cell theory, macromolecule, nucleuic acid,protein, lipid, carbohydrate, cell membrane, cell wall, cytoplasm, cytoskeleton, organelle, nucleus, chloroplast, passive transport, diffusion, osmosis, facilitative diffusion, a ...
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)↑ ↑ ↑ ↑ ↑ ↑