Individual phospholipid Phospholipid bilayer Liposome Phospholipid heads are attracted to water and to each other When shaken in water, Hydrophilic phosphate head Lipid bilayer the phospholipids self-organize into spheres, or liposomes. Water Phospholipid tails retreat from water and pivot inward, creating a bilayer. -Hydrophobic fatty acid tails Water Rectangular Snip Figure 4.3 Liposomes form when phospholipids and water are shaken together When you shake a mixture of phospholipids and water, the phospholipid bilayers bend and link together to form spheres called liposomes. This simple structure is remarkably similar to the basic structure of a cell.

Individual phospholipid Phospholipid bilayer Liposome Phospholipid heads are attracted to water and to each other When shaken in water, Hydrophilic phosphate head Lipid bilayer the phospholipids self-organize into spheres, or liposomes. Water Phospholipid tails retreat from water and pivot inward, creating a bilayer. -Hydrophobic fatty acid tails Water Rectangular Snip Figure 4.3 Liposomes form when phospholipids and water are shaken together When you shake a mixture of phospholipids and water, the phospholipid bilayers bend and link together to form spheres called liposomes. This simple structure is remarkably similar to the basic structure of a cell.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 4SA: Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids;...

See similar textbooks

Similar questions

Glycolipids are nonionic lipids that can orient themselvesinto bilayers as phospholipids do. They accomplish this featalthough they lack an ionic group like that of the phospholipids. Suggest a reason why this is possible.
Cellular memberane are mainly constructed of a phospholipid bilayer with emnedden cholesterol and proteins. Tues or False
in your own words, describe what would haooeb to the phospholipids f the plasma membrane in animals cells if cholesterol was not rpesent and the cell was expoed to extremely low temperatures?
What chemical property of phospholipids is key to the formation ofthe cell membrane?a. The positively charged nitrogen atomb. The covalent bond between the phosphate and the glycerolc. The kink in the fatty acid taild. The hydrophilic head and hydrophobic tails
Answer and EXPLAIN 3. Whichbestdescribesthestructureofacellmembrane? a. proteins between two bilayers of phospholipids b. proteinsembeddedinabilayerofphospholipids c. a bilayer of protein coating a layer of phospholipids d. cholesterolembeddedinabilayerofphospholipids 4. A plant cell placed in distilled water will ______________; an animal cell placed in distilled water will ______________. a. burst ... burst b. becomeflaccid...shrivel c. become turgid . . . be normal in shape d. becometurgid...burst 5. The sodium concentration in a cell is 10 times less than the concentration in the surrounding fluid. How can the cell move sodium out of the cell? (Explain your answer.) a. passive transport b. receptor-mediatedendocytosis c. active transport d. facilitateddiffusion 6. The synthesis of ATP from ADP and P a. stores energy in a form that can drive cellular work. b. involvesthehydrolysisofaphosphatebond. c. transfers a phosphate, priming a protein to do work. d. isanexergonicprocess. 7.…
Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECM
Solutes tend to diffuse from a region where they are _______ concentrated to an adjacent region where they are _______ concentrated. a. more, less b. less, more c. movement is independent of concentration
Why do the hydrocarbon tails of membrane phospholipids provide a barrier between the inside and outside ofthe cell?
When phospholipids are added to an aqueous environment (consisting mostly of water) the phospholipid molecules will spontaneously assemble into a phospholipid bilayer where the layers are held together by weak attractive forces between molecules. These structures are often seen in nature as cell and organelle membranes. _____________________________________________________________________________ 3. Which movement is more likely within a membrane, lateral movement or transverse (ie. flip-flop)? Why? 4. Which forces hold the phospholipid bilayer together?
The approximate thickness of the phospholipid bilayer is 10A 1 micro M 50A 150A 1nM
Cholesterol is abundant in the plasma membrane. Would you expect cholesterol to flipbetween the two leaflets of the membrane faster than phospholipids, or slower, or atthe same rate?
Detergents are synthetic soaplike substances that are used todisrupt membranes and extract membrane proteins. Explainhow this process works.