Suggest a reason why inorganic ions, such K+, Na+, Ca2+ and Mg2+, do not cross biological membranes by simple diffusion.
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Q: Suggest a reason why inorganic ions, such as K+, Na+, Ca2+, and Mg2+, do not cross biological…
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Suggest a reason why inorganic ions, such K+, Na+, Ca2+ and Mg2+, do not cross biological membranes by simple diffusion.
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- Suggest reason why iorganic ions such as K ,Na ,Mg ,Can do not cross biological membranes by simple diffusionExplain why the large, steroid hormone, estradiol (MW 272) readily crosses membranes by simple diffusion but the much smaller H+ requires transport proteins.using potassium permanganate as an example, explain in your own words how Brownian motion relates to diffusion
- Usually , rates of diffusion vary inversely with molecular weights; so smaller molecules diffuse faster than do larger ones. In cells, however, calcium ion diffuses more slowly than does cAMP. Propose a possible explanation.For this practice problem, would the answer be c)NaCl? My reasoning behind this is because molecules under 100 Da can use simple diffusion, while nonpolar molecules and larger molecules like benzene can use channels via facilitated diffusion. However, NaCl dissociates into ions and cannot readily use diffusion?Contrast the energetic difference between the diffusion of an electrolyte versus a nonelectrolyte across the membrane
- why is the molecular machinery for membrane fusion is important for any cell that utilizes vesicular transportFor the following modes of transport for membranes, tell whether the flow is with or against chemical potenial. Meaning +deltaG or -deltag A. Passive Diffusion B.Faciliated Diffusion C.Active TransportGive one way in which active transport differs from facilitated diffusion
- Discuss why the following affect the rate of diffusion:molecular size, temperature, solution density, and thedistance that must be traveled.Diffusion Compare and contrast lateral and transverse diffusion of lipids in the cellular membraneConsider a solute having a permeability coefficient of 10-6 m s-1 for the plasma membrane of a cylindrical Chara cell that is 100 mm long and 1 mm in diameter. Assume that its concentration remains essentially uniform within the cell. Untitled Title A. How much time would it take for 90% of the solute to diffuse out into a large external solution initially devoid of that substance?* B. How much time would it take if diffusion occurred only at the two ends of the cell?* C. How would the times calculated in A and B change for 99% of the solute to diffuse out? D. How would the times change if Pj were 10-8 m s-1?*