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+ -80 mV
+ -80 mV

... •Derives from the Nernst-Planck equation and a few assumptions •Uses permeabilities rather than conductances •Cl- is flipped to account for a -1 valence ...
What are cells? Your body is divided into tiny sections called cells
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... • There are cells that only function when they are part of a larger organism, such as the cells that make up your body. ...
CHS Science Dept. Biology Chapter 7 Sections 1 and 2 Vocabulary
CHS Science Dept. Biology Chapter 7 Sections 1 and 2 Vocabulary

... captures the energy from sunlight and converts it into chemical energy. Cytoskeleton Network of protein filaments within some cells that helps the cell maintain its shape and is involved in many forms of cell movement. Eukaryotic cells have this structure that helps support the cell. Centrioles Tiny ...
Eukaryotic Cells & Organelles
Eukaryotic Cells & Organelles

... Most plant cells have a large membrane covered chamber called a vacuole. It is used to store water, food, or other material needed by the cell. Also holds waste until it can be removed by the cell. Animal cells also have smaller vacuoles that serve the same purpose ...
CP BIO: Ch. 7 The Cell Membrane - Northern Highlands Regional HS
CP BIO: Ch. 7 The Cell Membrane - Northern Highlands Regional HS

... The Plasma membrane Boundary between the cell and its environment ...
Molecular dynamics simulations of membrane
Molecular dynamics simulations of membrane

... which are sufficient to produce a transient trans-membrane potential and an electrical field across the membrane of the order of ~ 108 V/m. This process is believed to involve (1) charging of the membrane due to ion flow, (2) rearrangement of the molecular structure of the membrane, (3) formation of ...
a molecule necessary and complementary to life. What elements are
a molecule necessary and complementary to life. What elements are

... Use the diagram to compute the relative ATP production by glycolysis and the electron transport chain. Take a deep breath. Just where is that oxygen going to be used? What by-product of respiration will be the result? ...
Passive - VA Biology SOL
Passive - VA Biology SOL

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Structures external to the Cell Wall:
Structures external to the Cell Wall:

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Unit 1: Cells - Loudoun County Public Schools
Unit 1: Cells - Loudoun County Public Schools

... c) Homeostasis is the biological balance, which cells must maintain for survival. d) Be able to explain why the cell membrane is made of a phospholipid bilayer. e) Very small molecules, like water, can pass directly through the cell membrane, this, is called passive transport. While large molecules, ...
Functions of Cell Parts
Functions of Cell Parts

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Lecture 3 Prokaryotic Cell Biology Part I 1) How does the
Lecture 3 Prokaryotic Cell Biology Part I 1) How does the

... 1) How does the arrangement of DNA differ between prokaryotes and eukaryotes? 2) What is coupled transcription-translation, and why does it happen only in prokaryotes? What’s a benefit to coupling these two processes? 3) What types of things are stored in cytoplasmic inclusion bodies? How would you ...
Organelles: Structure & Function
Organelles: Structure & Function

... Function: Transport, "intracellular highway“. Site of protein synthesis; makes more ER Structure: Thin folded membranes that are connected together. HAS ribosomes ...
What structures of living things are cells involved?
What structures of living things are cells involved?

... 1. What do fungus, a tree and a newt all have in common? 2. What is the basic unit of structure of living things? 3. What do cells form? 4. What structures of living things are cells involved? 5. What functions of living things are cells involved? ...
Plasma Membrane
Plasma Membrane

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Conclusion Questions: Osmosis In the beginning, there is more
Conclusion Questions: Osmosis In the beginning, there is more

... 1. In the beginning, there is more water ___Outside______________ the cell. 2. Explain why water molecules move across the membrane. Water moves from high concentrations to Low concentrations 3. After the diffusion of water, how much water is inside the cell compared to outside the cell? Why? There ...
Name_____________________________
Name_____________________________

... ____ Endoplasmic reticulum b. Stack of membranes containing enzymes that attach carbohydrates and lipids to proteins ____ Golgi apparatus c. Uses energy from food to make high-energy compounds ____ Lysosome d. An internal membrane system in which components of cell membrane and some proteins are con ...
High concentration
High concentration

... The cell membrane has little spaces where things can just slip right in or out of the cell. ...
Diffusion, Osmosis, and Active Transport
Diffusion, Osmosis, and Active Transport

... 2. For each of the situations below use an arrow to indicate the net movement of sugar into or out of the cell. (Assume that the sugar molecules can pass through the cell membrane in each case.) ...
Chapter 1 Section 2 Eukaryotic Cells
Chapter 1 Section 2 Eukaryotic Cells

... photosynthesis take place here which is the process by which plants and algae use sunlight, CO2 and water to make sugar and oxygen the are green because they contain chlorophyll chlorophyll traps the energy of sun ...
A Tour of the Cell - Science with Mr.Maxey
A Tour of the Cell - Science with Mr.Maxey

... Concept 6.3 Membranes regulate the traffic of molecules. (pp. 118–123) Molecules in a fluid are constantly in motion, colliding and bouncing as they spread out into the available space. Diffusion is the movement of the molecules of a substance from where they are more concentrated to where they are ...
Plant Cell
Plant Cell

...  The barrier between the cell and the environment.  Controls what gets in and out of a cell.  Building different membranes is one way different cell types are made. ...
Homeostasis Keystone Questions of the Day Key
Homeostasis Keystone Questions of the Day Key

... 9. Emphysema is a health condition in which the lungs can no longer expel carbon dioxide normally. As a result, a person who has emphysema may have high blood acidity levels. ...
3-3 Cell Organelles
3-3 Cell Organelles

... the ___________ ER because of its appearance. The rough ER helps ______________ proteins that are made by its _______________ ______________. As the protein is made it crosses the ER _____________ and enters the _____ where a portion of the ER is pinched off to form a ______________. A vesicle is a ...
Cell Structure and Function
Cell Structure and Function

... 1 - cell-surface marker: glycoprotein that identifies cell type. 2 - receptor protein: recognizes and binds to substances outside of cell. 3 – intergral protein: enzyme that assists chemical reactions inside cell cell. 4 – transport protein: helps substances move across cell membrane. 5 – peripheral ...
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Cell membrane



The cell membrane (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins. Cell membranes are involved in a variety of cellular processes such as cell adhesion, ion conductivity and cell signalling and serve as the attachment surface for several extracellular structures, including the cell wall, glycocalyx, and intracellular cytoskeleton. Cell membranes can be artificially reassembled.
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