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Sodium-Potassium pumps
Sodium-Potassium pumps

... resting potential, assists transport and regulates cellular volume.  In order to maintain the cell’s resting potential, cells must keep a low concentration of ↓ sodium ions & high levels of ↑ potassium ions within the cell. ...
Objective: You will be able to list the parts of the cell theory.
Objective: You will be able to list the parts of the cell theory.

... • Animal cells are round and plant cells are rectangular • Animal cells have lysosomes and centrioles • Animal cells have small vacuoles and plant cells have one large vacuole • Plant cells have chloroplasts and a cell wall ...
Click on each organelle to learn its function
Click on each organelle to learn its function

... Click on each organelle to learn its function ...
Cell Organelles Worksheet
Cell Organelles Worksheet

... Provides temporary storage of food, enzymes and waste products Firm, protective structure that gives the cell its shape in plants, fungi, most bacteria and some protests Produces a usable form of energy for the cell Packages proteins for transport out of the cell Everything inside the cell including ...
Molecular Dynamics Simulations of the Purple Membrane
Molecular Dynamics Simulations of the Purple Membrane

... Distribution of external water after MD Equilibration of PM: rearrangement of water molecules Before MD After MD ...
Active Reading Section: Introduction to Cells
Active Reading Section: Introduction to Cells

... The first cells to appear on Earth were prokaryotic cells. A prokaryote is an organism made of a single prokaryotic cell. The earliest prokaryotes may have arisen more than 2.5 billion years ago. Bacteria are prokaryotes. They are very small cells with a simple structure. Prokaryotes do not have a n ...
Cell
Cell

... • composed of a double layer of phospholipids and integral and peripheral proteins. • controls what enters/exits cells. • aids in maintaining the shape of cells. ...
Chapter 5 Homeostasis and Cell Transport PASSIVE TRANSPORT
Chapter 5 Homeostasis and Cell Transport PASSIVE TRANSPORT

... Multi-cellular organisms respond to hypotonic environments by pumping solutes out. This helps control the flow of water into the cell. Plants in a hypotonic environment can stand upright. The water fills the cell pressing the cell membrane up against the cell wall which is strong enough to resist br ...
The Cell
The Cell

... and regulates calcium levels ...
Cell Transport Notes
Cell Transport Notes

... Cell Transport Osmosis and Diffusion Passive transport does not require energy input from cell.  Molecules can move across cell membrane ...
Action Potential
Action Potential

... gradients. These are used to make ATP and to generate nerve impulses. ...
Ch. 5 Cells
Ch. 5 Cells

... c. carbohydrate. d. compound. ...
1 Cytology (Cells) Cells are the lowest level of organization that can
1 Cytology (Cells) Cells are the lowest level of organization that can

... *water insoluble, but does allow oxygen & carbon dioxide to pass b. “collage” of proteins embedded/attached to phospholipid bilayer; have pores or channels. 2 main types: 1) peripheral proteins—not embedded 2) integral proteins—penetrate through hydrophobic core—if all the way through, called transm ...
The Cell Membrane
The Cell Membrane

... enzymes that break down macromolecules into smaller ones that can be reused by the cell.  They also break down parts of the cell that are old or no longer needed as well as bacteria and foreign particles that have been ingested by the cell. ...
2.2 The Importance of Cell Division
2.2 The Importance of Cell Division

... – Multicellular organism: made up of more than one cell • grows by increasing their number of cells through cell division ...
Prokaryotic Cells, Eukaryotic cells and HIV: Structures, Transcription
Prokaryotic Cells, Eukaryotic cells and HIV: Structures, Transcription

... Nucleus – has pores so that small molecules and ions can freely cross and diffuse from cytosol, but NOT large proteins or nucleic acids (they must be transported) Other organelles, e.g. ER and mitochondria – no pores, must have special transport for ions, small molecules, and proteins ...
Name Date Period # Cell Test Review Across Down
Name Date Period # Cell Test Review Across Down

... 1. The outer wall of plant cells. It provides support and protection. 2. The site of photosynthesis​ in plant cells only​. 7. Found in animal cells and aid in cell division. 9. A large storage compartment ​in plant cells​ used for water and other materials. When filled, turgor pressure makes a plant ...
Cell Transport
Cell Transport

... molecules can move through it • Some channel proteins are open 24/7, others have gates that open/close in response to signals • Allow passage of charged ions (eg. Na+) and polar molecules (that cannot simply diffuse across CM) ...
Cell Analogy Project - Warren Hills Regional School District
Cell Analogy Project - Warren Hills Regional School District

... Please read the checklist below and check off each organelle as you add it in your chart: Cell Organelles ...
A cell is like a car..
A cell is like a car..

... Cell wall (plant)  The cell wall is for protection, structure, and support. ...
AP Biology Unit 2
AP Biology Unit 2

... Cell Biology Unit 2 – Cell Functions “How do cells maintain their internal environment and make energy? Capacity Matrix 2009 Fall Semester Approximate Timeline: 20 – 25 class periods Track your progress. Turn in the matrix at the end of the unit. Learner Target Activity Evidence State the importance ...
Cytology Unit – Review Sheet
Cytology Unit – Review Sheet

... Answer the following questions in the space provided. This Assignment will be checked at the beginning of Tuesdays class for 25 homework marks. The answers will be posted Tuesday. A. ...
Description
Description

... supports & protects cell ...
Diffusion & Osmosis
Diffusion & Osmosis

... important? All living things have certain requirements they must satisfy in order to remain alive – maintain homeostasis (stable environment)  These include exchanging gases (usually CO2 and O2), taking in water, minerals, and food, and eliminating wastes.  These tasks happen at the cellular level ...
phospho lipids
phospho lipids

... intracellular or extracellular aqueous environment ...
< 1 ... 494 495 496 497 498 499 500 501 502 ... 680 >

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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