THE CELL WK1 - Building block of cell

<p>They are hydrophilic and located on the membrane surface</p> Signup and view all the answers

<p>Both lipids and proteins</p> Signup and view all the answers

<p>To control the flow of information</p> Signup and view all the answers

<p>Peripheral protein</p> Signup and view all the answers

<p>To produce proteins activated via signaling pathways</p> Signup and view all the answers

<p>The protein's interactions with the lipid bilayer</p> Signup and view all the answers

<p>To serve as a selective barrier for the cell</p> Signup and view all the answers

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

<p>To provide structural support</p> Signup and view all the answers

<p>Their association with the lipid bilayer</p> Signup and view all the answers

<p>To form a hydrophobic and hydrophilic region</p> Signup and view all the answers

<p>A dynamic and fluid structure</p> Signup and view all the answers

<p>To serve as a connection between the cell's internal and external environments</p> Signup and view all the answers

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

<p>To facilitate the transport of ions and molecules</p> Signup and view all the answers

<p>To interact with the lipid bilayer and facilitate cellular functions</p> Signup and view all the answers

<p>Thickness of the bilipid layer</p> Signup and view all the answers

<p>Coupled transport</p> Signup and view all the answers

<p>To bind signaling molecules and initiate a physiological response</p> Signup and view all the answers

<p>They are multimeric proteins that form a passageway through the membrane</p> Signup and view all the answers

<p>It binds to GTP or GDP depending on activation</p> Signup and view all the answers

<p>It removes phosphates and deactivates the receptor</p> Signup and view all the answers

<p>Enzyme-linked receptors</p> Signup and view all the answers

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

<p>Gradient power of another transport process</p> Signup and view all the answers

<p>Energy production</p> Signup and view all the answers

<p>Dynamic and fluid</p> Signup and view all the answers

<p>Binding of hormone or signal molecules</p> Signup and view all the answers

<p>To regulate the flow of substances into and out of the cell</p> Signup and view all the answers

<p>Integral proteins are embedded in the membrane, while peripheral proteins are attached</p> Signup and view all the answers

<p>To regulate protein-protein interactions</p> Signup and view all the answers

<p>To transport materials within the cell</p> Signup and view all the answers

<p>To influence the fluidity of the membrane</p> Signup and view all the answers

<p>The cell membrane surrounds organelles</p> Signup and view all the answers

<p>They control the flow of ions and molecules across the membrane.</p> Signup and view all the answers

<p>The type of protein-lipid bilayer interaction, such as integral, peripheral, or lipid-anchored.</p> Signup and view all the answers

<p>They regulate the signaling pathways and transmission of information between cells.</p> Signup and view all the answers

<p>It provides a specific environment for protein-lipid interactions and affects protein function.</p> Signup and view all the answers

<p>Integral proteins are embedded in the lipid bilayer and play a crucial role in various cellular functions, such as transport and signaling. They are differentiated from peripheral proteins, which are attached to the surface of the membrane, but not embedded in the lipid bilayer.</p> Signup and view all the answers

<p>They are activated via signaling pathways, and their expression is regulated by differential transcription of genes.</p> Signup and view all the answers

<p>Lipid-anchored proteins are attached to the cell membrane through covalent bonds with lipids, and their primary function is to facilitate cell-cell interactions and signaling.</p> Signup and view all the answers

<p>To facilitate the transport of molecules across the membrane and maintain the cell's internal environment</p> Signup and view all the answers

<p>The function of a membrane protein is reflected in its association with the lipid bilayer.</p> Signup and view all the answers

<p>Through non-covalent bonds with the polar heads of phospholipids</p> Signup and view all the answers

<p>The fatty acid composition of the cell membrane determines its fluidity, with unsaturated fatty acids and chain length influencing the membrane's dynamic structure.</p> Signup and view all the answers

<p>They are covalently attached to a lipid and embedded in the lipid bilayer</p> Signup and view all the answers

<p>Receptors are proteins embedded in the cell membrane that bind to specific signal molecules, triggering an intracellular response and facilitating intercellular communication.</p> Signup and view all the answers

<p>To facilitate communication between cells and their environment</p> Signup and view all the answers

<p>Selective permeability refers to the ability of the cell membrane to regulate the passage of certain substances, while restricting others. This is crucial for maintaining proper cellular function and homeostasis.</p> Signup and view all the answers

<p>Electron transport proteins are involved in the process of energy production in mitochondria, facilitating the transfer of electrons during cellular respiration.</p> Signup and view all the answers

<p>They form a lipid bilayer with a hydrophobic tail and a hydrophilic head</p> Signup and view all the answers

<p>To facilitate recognition and communication between cells</p> Signup and view all the answers

<p>Integral proteins create hydrophilic and hydrophobic passageways, allowing for the transport of nutrients and other solutes across the cell membrane.</p> Signup and view all the answers

<p>By regulating the flow of ions and molecules across the cell membrane</p> Signup and view all the answers

<p>Vesicles are structures consisting of liquid or cytoplasm enclosed by a lipid bilayer, formed during secretion, uptake, and transport of materials within the plasma membrane.</p> Signup and view all the answers

<p>A lipid bilayer with embedded proteins</p> Signup and view all the answers

<p>Enzymes are proteins embedded in the cell membrane that facilitate specific cellular functions, such as energy production and solute transport.</p> Signup and view all the answers

<p>To facilitate various cellular reactions and processes</p> Signup and view all the answers

<p>By attaching to microfilaments in the cytoskeleton</p> Signup and view all the answers

<p>Integral proteins span the membrane and have a hydrophobic region that interacts with the lipid bilayer, whereas peripheral proteins are bound to the membrane surface and do not span the membrane.</p> Signup and view all the answers

<p>Lipid-anchored proteins are covalently linked to lipids and embedded in the lipid bilayer, allowing them to participate in cell signaling and membrane trafficking.</p> Signup and view all the answers

<p>Membrane proteins regulate the transport of molecules and ions across the membrane, maintaining the molecular and ionic compositions of cellular compartments.</p> Signup and view all the answers

<p>Receptor proteins bind to signaling molecules outside the cell and initiate a physiological response by transmitting signals across the membrane.</p> Signup and view all the answers

<p>Ion channel receptors are multimeric proteins that form a passageway across the membrane, allowing specific ions to flow through them in response to chemical or mechanical signals.</p> Signup and view all the answers

<p>G-protein coupled receptors transmit signals by binding to signaling molecules, which activates the alpha subunit, leading to dissociation of the G-protein complex and diffusion to interact with other membrane-bound proteins.</p> Signup and view all the answers

<p>Carrier proteins facilitate transport by binding to solutes and transporting them across the membrane, either alone (uniport) or in conjunction with other solutes (coupled transport).</p> Signup and view all the answers

<p>The permeability of a substance through a membrane depends on the substance's size, charge, and lipid solubility, as well as the membrane's lipid composition and protein-mediated transport mechanisms.</p> Signup and view all the answers

<p>Secondary active transport involves the transport of solutes against their concentration gradient, driven by the energy generated from the formation of another ion gradient.</p> Signup and view all the answers

<p>Protein channels that allow direct exchange of ions, nutrients, and waste between cells</p> Signup and view all the answers

<p>Connexin protein molecules</p> Signup and view all the answers

<p>efine apical and basolateral plasma membrane domains in polarised epithelial cells and control the flow of solutes between cells in an epithelial sheet.</p> Signup and view all the answers

<p>A mechanism of cell signaling</p> Signup and view all the answers

<p>Brain-Derived Neurotrophic Factor (BDNF) binding</p> Signup and view all the answers