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- only in cell biology...... Which ones of the following are examples of passive transporters? i. Na+-K+ pump ii. Glucose Transporter iii. Ca++ Pump iv. Na+ Channel v. H+ PumpHere is a chloride cell in the gill epithelium of a fish. For reference, NKA = Na+/K+ ATPaseNKCC = Na+/K+/Cl- cotransporter. CFTR allows for movement of Cl- from inside the cell out into the water down a concentration gradient. Which of the following would be true of CFTR? A. It is a primary active transporter. B. It is a symporter. C. It is a secondary active transporter. D. It is a channel that allows for facilitated diffusion.The three fundamental classes of proteins involved in transport across membranes are: i) channelsii) pumpsiii) exchangers For each class, describe its essential features, explain how transport is accomplished and name at least one representative example.
- List two ways that channels differ from transporters? What type of molecules do channels usually transport?Describe the difference between carrier proteins and channel proteins. What is required for the passive transport of molecules through these membrane proteins?Describe active transport, including primary and secondary active transport in your description. Explain how active transport differs from facilitated diffusion.
- what would happen to the transport of sater across a membrane if the aqua poring were non-functional? Would water still be able to cross, why or why not? Please explain in 3-8 sentences only. ThanksAmong the membrane transporters, the channels require energy and therefore are involved in active transport. * D. Disagree, because channels are not proteins and therefore are not involved in active tranport. A. Agree, because channels are associated with H+-ATPase. B. Disagree, because the pumps are the ones involved in active transport. C. Agree, because channels are proteins involved in active transport.A migrating fish would be rapidly transferring substances across cell membranes. These substances would include sodium, water, carbon dioxide, oxygen, and steroids. Which of those would be most likely to be moved via active transport? Why? What is a transmembrane gradient? What is an electrochemical gradient?
- Cells transporting substances across their membranes is essential. Choose TWO of the following types of cellular transport. ๏osmosis ๏active transport ๏facilitated diffusion ๏endocytosis / exocytosis (a)For each type of transport you choose, describe the transport process. Explain how the organization of cell membrane plays a role the movement of specific molecules across membrane. (b)Using the same transport types, identify a specific cell that utilizes that type of transit (i.e. one cell for each transport type, or two different cell examples), and detail a substance that is transferred. (c)A typical human lymphocyte has a radius of about 10 μm, while a typical bacterium (e.g., S. pneumoniae) has a radius of about 1 μm. Assuming that both cell types are perfectly spherical, compare and contrastthe transport mechanisms for each of these cells.Determine the type of transport. Here are your options:Simple diffusion, facilitated diffusion, osmosis, primary activetransport, secondary active transport1. A hydrophobic molecule is moving through the membrane2. K+ moving against its gradient (low to high) through the sodiumpotassium pump3. Water moving through the cell membrane4. A solute moving down its gradient through a carrier protein"Transporters saturate at high concentrations of the transported molecule when all their binding sites are occupied; channels, on the other hand, do not bind the ions they transport and thus the flux of ions through a channel does not saturate." is true or false.