'Net movement' diaporamas de présentation

1. Which of the following particles is negatively charged?

1. Which of the following particles is negatively charged? . electron isotope neutron proton. 2. Identify the proteins that speed up the rate of chemical reactions. substrates enzymes ions reactants. 3. What causes the overall charge of an atom to be zero?.

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Membrane Potentials, Action Potentials, and Synaptic Transmission

Membrane Potentials, Action Potentials, and Synaptic Transmission. Core Curriculum II Spring 2014. Membrane Potential. Example 1: K + , Cl - equally permeant no charge imbalance, so V m =0. Membrane Potential. Example 2: only K + is permeant

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AP Chapter 13

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Membrane Dynamics

Membrane Dynamics. Cell membrane structures and functions Membranes form fluid body compartments Membranes as barriers and gatekeepers How products move across membranes i.e., methods of transport Distribution of water and solutes in cells & the body Chemical and electrical imbalances

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2.4.4: Define diffusion and osmosis

2.4.4: Define diffusion and osmosis Diffusion : The passive movement of particles from a region of high concentration to a region of low concentration until equilibrium is reached. (Molecules still move after equilibrium is reached) . 2.4.4: Diffusion. 2.4.4: Define diffusion and osmosis.

668 views • 40 slides

Cell Structure and Function

Cell Structure and Function. Chapter 3. Size Comparison. Domain II: Cellular Basis of Life. *Explain the cellular basis of life *Homeostasis *Transport cellular material through cell membrane *Stem Cells. What is a Stem Cell?. What have you heard about stem cells?

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Homeostasis requires exchanging materials with the environment. How do you do it?

Homeostasis requires exchanging materials with the environment. How do you do it?. Surfaces of contact with the environment let in oxygen and nutrients and excrete wastes. The surface of contact between a cell and its environment is its plasma membrane.

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Literacy and Science Education

Literacy and Science Education. Bert Caine EDU 268 10/15/2012. Lesson Plan Outline. 1) front-loading of vocabulary 2) Didactic lecture with note scaffolding 3) lab activity with realia and forced use of vocabulary in lab report. Cell Boundaries.

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Solutions and Their Behavior

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Membrane at Rest

Membrane at Rest. Selectively Permeable Channels Ion Concentration Differences Nernst Relationship Ion Pumps. Reflex Loop: Sensory-to-Motor. Water. Phospholipid Bilayer. Membrane is Impermeable. Channels Allow Ions to Pass. Protein Structure. Ion Channel. Potassium Channel.

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Starter

Starter. What is the function of the cell membrane? What types of macromolecules make up the cell membrane? How can the membrane be damaged?. Cell Membranes. Cell Membrane. All living things are surrounded by a membrane.

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Plasma Membrane

Plasma Membrane. Structure and Function. Fluid Mosaic Model of Membrane Structure. Oligosaccharides. Phospholipid Bilayer. Membrane Proteins. Outer Surface. Cholesterol. Cytoplasm. Macromolecules found in Membranes. Lipids Phospholipid bilayer Cholesterol Proteins Transport proteins

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Water and Solute Transport

Water and Solute Transport. Homeostasis Requires Exchange of Materials. Transportation of solutes in solution Movement between external and internal environments Movement between internal environment and cells Movement must be regulated. Cell Membranes.

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Demonstration of Diffusion & Osmosis using an Artificial Membrane

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Cell Membranes

Cell Membranes. I . All cells are enclosed in a Plasma (Cell) Membrane. Separates the cell from its surroundings Regulates the contents of the cell Allows the passage of some materials but not others . II. Membrane Structure. A. Phospholipid Bilayer Composed of phospholipids

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OSMOSIS & DIFFUSION

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Diffusion and Osmosis in plant and animal cells

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Transport

Transport. By Monica 11C. Diffusion . Is the passive movement of molecules, atoms or ions along a concentration gradient, from a region of high concentration to a region of low concentration.

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Hyper/Hypo/Isotonic Solutions

Hyper/Hypo/Isotonic Solutions. Isotonic. Isotonic cellular environments occur when the concentration outside of the cell and the concentration in the cytoplasm (inside) of the cell is the same. While water will move in and out, there is no NET movement of molecules. Hypertonic.

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