AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

Lipid bilayer

Campbell AP Bio Study Guide Chapter 7

Subject:

Rating:

No votes yet

Campbell's Biology, 9e (Reece et al.) Chapter 7 Membrane Structure and Function Membranes and membrane transport are fundamental to cellular life. The concepts in this chapter require integration of concepts from previous chapters: the nature of water and hydrophobic versus hydrophilic molecules, the properties of lipid molecules and their role in regulating membrane fluidity, and the roles of proteins and carbohydrates in membrane function. The concepts of ion transport and electrochemical gradients across membranes are important foundations for the following chapters on energy metabolism. Finally, the bulk transport phenomena have important clinical significance in the immune system, during invasion by pathogens, and in cell signaling. Multiple-Choice Questions

Campbell Biology Test Bank Chapter 7

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Membrane potential

Facilitated diffusion

Biological membrane

Semipermeable membrane

Membrane protein

Campbell's Biology, 9e (Reece et al.) Chapter 7 Membrane Structure and Function Membranes and membrane transport are fundamental to cellular life. The concepts in this chapter require integration of concepts from previous chapters: the nature of water and hydrophobic versus hydrophilic molecules, the properties of lipid molecules and their role in regulating membrane fluidity, and the roles of proteins and carbohydrates in membrane function. The concepts of ion transport and electrochemical gradients across membranes are important foundations for the following chapters on energy metabolism. Finally, the bulk transport phenomena have important clinical significance in the immune system, during invasion by pathogens, and in cell signaling. Multiple-Choice Questions

Cell Membrane

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Facilitated diffusion

Carrier protein

Membrane protein

Passive transport

Active transport

Cell Membrane Fluid Mosaic Model: Cell membranes consist of a fluid formed by a phospholipid bilayer and a ?mosaic?, or patchwork, of proteins Phospholipid: Polar and hydrophilic head, nonpolar and hydrophobic fatty acid tail Cell membrane also called plasma membrane Outside the membrane there is interstitial fluid, which is a salty liquid Inside the membrane there is the cytosol, which is mostly water. The cytosol is also the water portion of the cytoplasm Phospholipid bilayer: Formed since the hydrophilic heads form hydrogen bonds with water, causing the heads to face the water on either side. Since the fatty acid tails are hydrophobic, they cluster together within the bilayer

AP Bio Unit Objectives (Chapter 8)

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Biological membrane

Passive transport

Membrane protein

Active transport

Semipermeable membrane

Membrane transport

Chapter 8: Membrane structure and function Membrane Structure Membrane models have evolved to fit new data Membranes are fluid Membranes are mosaics of structure and function Membrane carbohydrates are important for cell-cell recognition Traffic across membranes A membranes molecular organization results in selective permeability Permeability of the lipid bilayer Transport proteins Passive transport is diffusion across a membrane Osmosis is the passive transport of water Cell survival depends on balancing water uptake and loss Water balance of cells without walls Water balance of cells with walls Specific proteins facilitate the passive transport of water and selected solutes Active transport is the pumping of solutes against their gradients

bio

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Membrane protein

Semipermeable membrane

Transmembrane protein

Endoplasmic reticulum

Peripheral membrane protein

cell membrane bio

1 Division Ave High School Ms. Foglia AP Biology AP Biology Cell Membrane AP Biology Overview ?? Cell membrane separates living cell from nonliving surroundings ?? thin barrier = 8nm thick ?? Controls traffic in & out of the cell ?? selectively permeable ?? allows some substances to cross more easily than others ?? hydrophobic vs hydrophilic ?? Made of phospholipids, proteins & other macromolecules AP Biology Phospholipids Fatty acid Phosphate ?? Fatty acid tails ?? hydrophobic ?? Phosphate group head ?? hydrophilic ?? Arranged as a bilayer Aaaah, one of those structure?function examples AP Biology Phospholipid bilayer polar hydrophilic heads nonpolar hydrophobic tails polar hydrophilic heads AP Biology

Ch. 7 Membrane Structure and Function

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Membrane protein

Membrane transport

Facilitated diffusion

Semipermeable membrane

Carrier protein

Passive transport

Ch. 7 Membrane Structure and Function Plasma membrane separates living cell from its surroundings Controls traffic into and out of the cell it surrounds Selectively permeable: allows some substances to cross easier than others One of the earliest episodes in the evolution of life may have been the formation of a membrane that enclosed a solution different from the surrounding solution while still permitting the uptake of nutrients and elimination of waste products. Ability of cell to discriminate in chemical exchanges with its environment is fundamental to life Lipids and proteins are the staple of membranes; carbohydrates are also important Phospholipid is amphipathic meaning it has hydrophilic and hydrophobic regions

Campbell Biology 9th - Unit 1

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Endomembrane system

Membrane protein

Endoplasmic reticulum

Biological membrane

Facilitated diffusion

9/28/13 2:53 PM Tools used to study cells Microscopy Light microscope Electron microscope Scanning Transmission Cell fractionation - centrifuge Cells ? simplest collection of matter that can be alive All contain: Plasma membrane Cytosol Chromosomes Ribosomes Cytoplasm ? interior of cell Limited to small size because High SA to volume ration necessary for exchange between cell & environment As cells grow, volume increases at higher rate than SA Prokaryotic Lack nuclei and other membrane-enclosed organelles Nucleoid Location of DNA Not membrane enclosed Fimbriae Ribosomes Plasma membrane Cell wall Capsule Flagella Surface to volume ratio is important parameter affecting cell size & shape ORGANELLES IN EUKARYOTIC CELL Nucleus Functions: Houses chromosomes

Membrane Biocomplexity

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Membrane protein

Membrane fluidity

Lipid bilayer phase behavior

Ethanol induced non-lamellar phases in phospholipids

Hailey Dickson Ms. Musheno AP Biology, 6 28 August 2013 FRQ

Cell Membrane

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Membrane protein

Membrane transport

Carrier protein

Semipermeable membrane

Passive transport

Biological membrane

Active transport - The transport of molecules across a membrane and against their natural flow; mediated by carrier proteins and requiring outside energy. Carrier protein - A protein responsible for mediating the active transport of molecules from one side of the lipid bilayer to the other. Transport is carried out by a conformational change that occurs within the protein that forms an opening for specific molecules to pass through. Channel protein - A protein responsible for mediating the passive transport of molecules from one side of the lipid bilayer to the other. Transport is carried out by its membrane-spanning hydrophilic structure which, when open, allows molecules to pass through.

Cell Membrane

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Membrane protein

Membrane transport

Carrier protein

Semipermeable membrane

Passive transport

Transmembrane protein

Active transport - The transport of molecules across a membrane and against their natural flow; mediated by carrier proteins and requiring outside energy. Carrier protein - A protein responsible for mediating the active transport of molecules from one side of the lipid bilayer to the other. Transport is carried out by a conformational change that occurs within the protein that forms an opening for specific molecules to pass through. Channel protein - A protein responsible for mediating the passive transport of molecules from one side of the lipid bilayer to the other. Transport is carried out by its membrane-spanning hydrophilic structure which, when open, allows molecules to pass through.

Pages

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!

About Course-Notes.Org