Which statements are true? Explain why or why not.1 Transport by transporters can be either active orpassive, whereas transport by channels is always passive.2 Transporters saturate at high concentrations ofthe transported molecule when all their binding sites areoccupied; channels, on the other hand, do not bind theions they transport and thus the flux of ions through achannel does not saturate.3 The membrane potential arises from movementsof charge that leave ion concentrations practically unaf-fected, causing only a very slight discrepancy in the num-ber of positive and negative ions on the two sides of themembrane.

Q: Explain why 02 can pass through the plasma membrande but ions must use transmembrane proteins

A: Oxygen & carbon dioxide get across cell layers by means of simple diffusion, a cycle that needs…

Q: In which way are voltage-gated ion channels and active transporters similar?  a   they are…

A: The molecules and ions can travel through the membranes. The membranes include the cell membrane,…

Q: In this scenario, potassium is in the lumen of the nephron (blue) and will need to cross epithelia…

A: Nephrons are the functional units of the kidneys. A nephron consists of tubules and associated…

Q: 9. Water moves across a cell membrane through a channel protein, whereas glucose moves across a cell…

A: Passive transport is a membrane transport system applicable for small molecules or ions that do not…

Q: Understanding membranes: a) Describe the factors that influence fatty acid melting temperatures…

A: The fluidity of membrane depends on the fatty acids present in it. Fatty acids form an integral part…

Q: Make some generic comments about channel structure and activity. Why does solute pass extremely fast…

A: Transport channels are integral membrane proteins that facilitate the movement of solutes, such as…

Q: The average human generates approximately their own weight in ATP every day. A resting person uses…

A: Sodium-Potassium pump is a P class pump, where, P stands for phosphorylation. Pumps are…

Q: The direction of diffusion of solutes is always: Oa. from higher to lower [solute] O b. from higher…

A: Diffusion is the movement of molecules from an area with higher concentration to an area with lower…

Q: Which statement is NOT true of membrane transport • proteins? A. Their specificity depends on their…

A: They are integral membrane proteins that facilitates the movement of various substances across the…

Q: O Macmillan Learning A section of membrane with an aquaporin (AQP) has a water transport rate of…

A: The question relates to the role of aquaporins (AQPs) in encouraging water transport over cell…

Q: location are corn Question 74 In active transport solute mo O True

A: a) True

Q: In the stomach, parietal cells are responsible for the formation of the gastric juice. During acid…

A: The difference in electric potential between the interior and exterior of a biological cell is known…

Q: Explain why the large, steroid hormone, estradiol (MW 272) readily crosses membranes by simple…

A: Hormones are signaling molecules that act as chemical messengers. They are secreted by endocrine…

Q: Are symporters and antiporters always involved in active transport? Can't both solutes move in the…

A: The cell uses active transport, that takes energy derived from ATP, to move molecules against the…

Q: 7. The diffusion constant for the membrane protein fibronectin is approximately 0.7 x 10-12 cm²/sec,…

A: For fibronectin:Dfibronectin = 0.7 x 10-12 cm2/sect = 50 x10-3 secDistance =…

Q: Explain the difference between simple and facilitated diffusion.

A: Simple diffusion and facilitated diffusion are the same in which transport of substances occurs…

Q: Clathrin- Carrier protein dependent receptor mediated endocytosis pump Involvement of multiple types…

A: Transport across the plasma membrane involves various transporters pumps and vesicle mediated…

Q: Determine whether you would expect the interior of an H+transport protein to be positively or…

A: The transport proteins are transmembrane proteins that mediate the active or passive transport of…

Q: help fill in these blanks in [] Sodium-potassium ATPases are [passive/active]…

A: Substances are carried across the cell membrane with the help of transporters which are proteins in…

Q: 6. What is the value of AG for the inward movement of glucose through a facilitated diffusion…

A: Given: Extracellular concentration of glucose = 5mM Intracellular concentration of glucose = 1mM…

Q: When we say that carrier-mediated transport exhibits saturable binding, it means that: Transport is…

A: There are three different types of transports in the living system – simple diffusion, facilitated…

Q: CHEGG Considering what actions occur along the ascending loop of Henle (membrane permeability,…

A: The nephron is the basic functional unit of the kidney that receives the filtrate from the…

Q: The figure below shows the movement of a particular ion across a cellular membrane. + + + + + + + +…

A: In a living cell, the concentration gradient of Na+ tends to drive it into the cell, and the…

Q: Coupled transport across a cell membrane: O requires isomerization of a pigment molecule by a…

A: The simultaneous movement of two substances through a biological membrane is known as coupled…

Q: Ion transporters are “linked” together—not physi-cally, but as a consequence of their actions. For…

A: Introduction Our body contains different types of ions such as Sodium, Potassium, Calcium, Chloride,…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.