Plasma Membrane 1

<p>Hydrophilic head with a polar phosphoglycerol group</p> Signup and view all the answers

<p>Hydrophobic barriers</p> Signup and view all the answers

<p>Trilaminar appearance</p> Signup and view all the answers

<p>Regulate movement of materials into and out of the cell</p> Signup and view all the answers

<p>Selectively permeable to polar solutes</p> Signup and view all the answers

<p>Facilitates electrical signaling between cells</p> Signup and view all the answers

<p>Producing genetic mutations</p> Signup and view all the answers

<p>They regulate which molecules can pass based on size and polarity</p> Signup and view all the answers

<p>Help separate processes and compartments within the cell</p> Signup and view all the answers

<p>Separate anabolic and catabolic processes</p> Signup and view all the answers

<p>Mitochondria</p> Signup and view all the answers

<p>Facilitate transport across the membrane</p> Signup and view all the answers

<p>Lipids</p> Signup and view all the answers

<p>Mitochondria</p> Signup and view all the answers

<p>$Ca^{2+}$ and $Mg^{2+}$</p> Signup and view all the answers

<p>Eukaryotic membranes are composed of different types of phospholipids, while prokaryotic membranes are composed of a single type.</p> Signup and view all the answers

<p>Increase both mechanical stability and fluidity.</p> Signup and view all the answers

<p>To allow for the transport of material between organelles and the plasma membrane.</p> Signup and view all the answers

<p>With hydrophobic tails in the interior and hydrophilic heads outside to water.</p> Signup and view all the answers

<p>To enable the splitting of a membrane into two parts for transport purposes.</p> Signup and view all the answers

<p>They dissolve readily in water due to uncharged polar groups that interact favorably with water molecules.</p> Signup and view all the answers

<p>The closed structure prevents the exposure of hydrophobic tails to water, which is energetically unfavorable.</p> Signup and view all the answers

<p>Fatty acids</p> Signup and view all the answers

<p>Vesicles are naturally occurring, while liposomes are artificial structures created in laboratories.</p> Signup and view all the answers

<p>Metabolism</p> Signup and view all the answers

<p>Scanning electron microscopy (SEM)</p> Signup and view all the answers

<p>Their cylinder-shaped form leads to bilayer or liposome formation.</p> Signup and view all the answers

<p>Serving as an attachment surface</p> Signup and view all the answers

<p>Eukaryotic cells</p> Signup and view all the answers

<p>By being selectively permeable</p> Signup and view all the answers

<p>Providing a barrier to separate cellular compartments</p> Signup and view all the answers

<p>Electron microscopy</p> Signup and view all the answers

<p>Segregating processes and compartments</p> Signup and view all the answers

<p>Fluid and dynamic</p> Signup and view all the answers

<p>Hydrophilic heads</p> Signup and view all the answers

<p>Hydrophilic head</p> Signup and view all the answers

<p>Thinner membranes allow for faster diffusion.</p> Signup and view all the answers

<p>Trilaminar appearance</p> Signup and view all the answers

<p>Freezefracture</p> Signup and view all the answers

<p>It prevents the exposure of the hydrophobic hydrocarbon tails to water, which is energetically unfavorable.</p> Signup and view all the answers

<p>Amphipathic molecules</p> Signup and view all the answers

<p>Vesicles consist of liquid enclosed by a lipid bilayer, while liposomes consist of cytoplasm enclosed by a lipid bilayer.</p> Signup and view all the answers

<p>Lipids spontaneously form vesicles and bilayers due to their amphipathic nature.</p> Signup and view all the answers

<p>Vesicles are involved in temporary storage, transport, and metabolic processes within cells.</p> Signup and view all the answers

<p>Liposomes consist of liquid enclosed by a lipid bilayer, while vesicles consist of cytoplasm enclosed by a lipid bilayer.</p> Signup and view all the answers

<p>Breaking apart a frozen biological sample to study the membrane</p> Signup and view all the answers

<p>Enhance the ability to pack together and influence membrane fluidity</p> Signup and view all the answers

<p>The presence of double bonds in unsaturated fatty acids</p> Signup and view all the answers

<p>Phosphatidylcholine, phosphatidylserine, phosphatidylethanolamine, sphingomyelin</p> Signup and view all the answers

<p>It reveals internal membrane organization by fracturing frozen samples</p> Signup and view all the answers

<p>It creates a 3D view of surfaces inside cells by etching frozen samples</p> Signup and view all the answers

<p>Avoiding interference in reactions</p> Signup and view all the answers

<p>Mitochondria and ER</p> Signup and view all the answers

<p>Lipids</p> Signup and view all the answers

<p>Mitochondria</p> Signup and view all the answers

<p>By facilitating the exchange of signaling molecules</p> Signup and view all the answers

<p>To interact with other molecules and transport materials</p> Signup and view all the answers

<p>Fluid mosaic model</p> Signup and view all the answers

<p>Proteins</p> Signup and view all the answers

<p>Attract water and charged compounds</p> Signup and view all the answers

<p>Facilitates movement of transmembrane proteins</p> Signup and view all the answers

<p>Freezefracture</p> Signup and view all the answers

<p>Thicker membranes impede diffusion</p> Signup and view all the answers

<p>Facilitating electrical signaling between cells</p> Signup and view all the answers

<p>To only permit certain molecules to cross while blocking others</p> Signup and view all the answers

<p>Membrane lipids</p> Signup and view all the answers

<p>By facilitating electron transport chain reactions</p> Signup and view all the answers

<p>Providing flexibility and selective permeability</p> Signup and view all the answers

<p>Providing attachment points for cytoskeleton proteins</p> Signup and view all the answers

<p>It stabilizes the closed structure by avoiding exposure of hydrophobic tails to water.</p> Signup and view all the answers

<p>Micelles are cone-shaped, while bilayers are cylinder-shaped.</p> Signup and view all the answers

<p>Free edges</p> Signup and view all the answers

<p>To have cytoplasm with different composition from the cytosol</p> Signup and view all the answers

<p>Liposomes consist of liquid/cytoplasm enclosed by a lipid bilayer, while vesicles are intra or extra cellular structures.</p> Signup and view all the answers

<p>To provide stability and enclosure</p> Signup and view all the answers

<p>Serve as structural links between the cytoskeleton and the extracellular matrix</p> Signup and view all the answers

<p>Consists of amphipathic lipid molecules</p> Signup and view all the answers

<p>They serve as targets for over 50% of modern medicinal drugs</p> Signup and view all the answers

<p>Phospholipids</p> Signup and view all the answers

<p>Due to special properties of lipids that cause spontaneous assemblage into bilayers</p> Signup and view all the answers

<p>To facilitate signal transduction and proper cell function</p> Signup and view all the answers

<p>It physically breaks apart frozen biological samples to expose structural detail</p> Signup and view all the answers

<p>To anchor the phospholipid in the membrane</p> Signup and view all the answers

<p>They affect the ability of phospholipid molecules to pack together and guarantee membrane fluidity</p> Signup and view all the answers

<p>To provide contrast for electron microscopy</p> Signup and view all the answers

<p>Phospholipids</p> Signup and view all the answers

<p>Create small kinks in the fatty acid tails</p> Signup and view all the answers