Which of the following compounds would most likely need to be transported aca biological membrane by primary active transport? Choose the one best answer1) Ethanol (CH3CH₂OH)2) Nitrogen (N₂)3) glucose (C6H 1206)JhayCalcium ion (Ca²+)5) Acetone (C3H₂O)(4) Which of the following describe active transport or is an example of acttransport of a substance across a membrane? Choose all correct answerGlucose transport into intestinal epithelial cellsGlucose transport into muscle cellsNa* ion pumping out and K* ion pumping into the cellTransport requires a mediatorRequires input of energy for transportMovement of ligand against the concentration gradient

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Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 4UC

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Glucose transporters are either open to the extracellular side or open to the intracellular side of the membrane but never both at the same time. True or False? Movement of an ion against or up its concentration gradient is exergonic. True or False? If an amino acid is transported into intestinal epithelial cells through a transporter that is able to concentrate the amino acid using a sodium ion moving down its gradient, this transporter is an example of primary active transport. True or False? The maximum gradient a primary active transporter can build has a potential energy which in magnitude is greater than or equal to the magnitude of the energy released by ATP hydrolysis. True or False?
If a skeletal muscle has depleted its stores of ATP how will the altered transport properties of the following transporters affect cytosolic ion concentrations (increase, decrease, no change) relative to normal? Skeletal Muscle Cell With Depleted ATP Stores Ion transporter Cytosolic K+ Cytosolic Na+ Cytosolic Ca2+ NKA NCX SERCA
Movement of glucose from one side to the other side of the intestinal epithelium is a major example of transcellular transport. How does the Na+/K+ ATPase power the process? Why are tight junctions essential for the process? Why is localization of the transporters specifically in the apicalor basolateral membrane crucial for transcellular transport? Rehydration supplements such as sport drinks include a sugar and a salt. Why are both important to rehydration?
The cells lining the small intestine rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using this information which transport mechanism is most probably functioning in the intestinal cells? a) simple diffusion b) phagocytosis c) active transport pump d) exocytosis e) Facilitated diffusion
What effect will increasing the proportion of unsaturated fatty acids in the bilayer have on the membrane's permeability to glucose? A) Permeability to glucose will increase. B) Permeability to glucose will decrese. C) Permeability to glucose will stay the same. D) Permeability will decrease initially then increase as the bilyaer fills with glucose.
Glucose is transported across the cell membrane of intestinal cells. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using this information, which transport mechanism is most probably functioning in the intestinal cells? A facilitated diffusion B simple diffusion C osmosis D concentration gradient
Match the transport process to the correct description or example. Primary Active Transport is: Group of answer choices transport of glucose out of cell, with its concentration gradient transport of sodium out of a neuron using the sodium potassium pump breaking of a covalent bond to create new molecules transport of large macromolecules into a cell transport of signal molecules out of an endocrine cell transport of a steroid hormone into a cell transport of glucose into a cell, against its concentration gradient import of an entire bacterium into a white blood cell
Which of the following does not directly or indirectly require an energy source?a. primary active transportb. operation of the Na1/K1-ATPase pumpc. the mechanism used by cells to produce a calcium ion gradient across the plasma membraned. facilitated transport of glucose across a plasma membranee. secondary active transport
Channels are an example of transporters with alternating gates; in other words, channels change conformation upon cargo binding to release the cargo on the opposite side of the membrane. True or False? Polar solutes must be ‘re-hydrated’ by the interactions with the transporter to allow for rapid transport. True or False? The sodium potassium pump is an example of an antiport. True or False?
secondary active transport depends on which of the following principles? a. sodium is pumped out of the cell against a concentration gradient by primary active transport b. sodium moves out of the cell with a concentration gradient c. primary active transport is necessary to pump sodium into the cell from a higher to lower concentration d. diffusion causes sodium to move out of the cell
Select the correct statments regarding transport of molecules across the cell membrane. Non-mediated transport is susceptible to saturation of transporter/channel proteins. Channels and transporters need not use energy to transport solute down the concentration gradient. The Na+/K+ antiport takes advantage of electrochemical gradients to exchange Na+ and K+ ions across the cell membrane. Active transport via electrochemical gradients relies on the passive transport of one solute to transport a second solute against the concentration gradient. Describe the three main sources of membrane fluidity
When the nerves deliver a signal to contract, Ca++ (calcium ions) rush into the cell. The calcium ion influx causes specialized fibers to contract. Afterward, calcium ions are pumped out of the cell by calcium ATPases. What transport type(s) is occuring?s antiporter only ion gated transport followed by active transport active transport only ion gated transport only active transport followed by ion gated transport

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